Alchemy in the context of Rasayana

The history of science covers the development of science from ancient times to the present. It encompasses all three major branches of science: natural, social, and formal. Protoscience, early sciences, and natural philosophies such as alchemy and astrology that existed during the Bronze Age, Iron Age, classical antiquity and the Middle Ages, declined during the early modern period after the establishment of formal disciplines of science in the Age of Enlightenment.

The earliest roots of scientific thinking and practice can be traced to Ancient Egypt and Mesopotamia during the 3rd and 2nd millennia BCE. These civilizations' contributions to mathematics, astronomy, and medicine influenced later Greek natural philosophy of classical antiquity, wherein formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Latin-speaking Western Europe during the early centuries (400 to 1000 CE) of the Middle Ages, but continued to thrive in the Greek-speaking Byzantine Empire. Aided by translations of Greek texts, the Hellenistic worldview was preserved and absorbed into the Arabic-speaking Muslim world during the Islamic Golden Age. The recovery and assimilation of Greek works and Islamic inquiries into Western Europe from the 10th to 13th century revived the learning of natural philosophy in the West. Traditions of early science were also developed in ancient India and separately in ancient China, the Chinese model having influenced Vietnam, Korea and Japan before Western exploration. Among the Pre-Columbian peoples of Mesoamerica, the Zapotec civilization established their first known traditions of astronomy and mathematics for producing calendars, followed by other civilizations such as the Maya.

Science in the ancient world encompasses the earliest history of science from the protoscience of prehistory and ancient history to late antiquity. In ancient times, culture and knowledge were passed through oral tradition. The development of writing further enabled the preservation of knowledge and culture, allowing information to spread accurately.

The earliest scientific traditions of the ancient world developed in the Ancient Near East, with Ancient Egypt and Babylonia in Mesopotamia. Later traditions of science during classical antiquity were advanced in ancient Persia, Greece, Rome, India, China, and Mesoamerica. Aside from alchemy and astrology that waned in importance during the Age of Enlightenment, civilizations of the ancient world laid the roots of modern sciences.

The history of science during the Age of Enlightenment traces developments in science and technology during the Age of Reason, when Enlightenment ideas and ideals were being disseminated across Europe and North America. Generally, the period spans from the final days of the 16th- and 17th-century Scientific Revolution until roughly the 19th century, after the French Revolution (1789) and the Napoleonic era (1799–1815). The scientific revolution saw the creation of the first scientific societies, the rise of Copernicanism, and the displacement of Aristotelian natural philosophy and Galen's ancient medical doctrine. By the 18th century, scientific authority began to displace religious authority, and the disciplines of alchemy and astrology lost scientific credibility.

While the Enlightenment cannot be pigeonholed into a specific doctrine or set of dogmas, science came to play a leading role in Enlightenment discourse and thought. Many Enlightenment writers and thinkers had backgrounds in the sciences and associated scientific advancement with the overthrow of religion and traditional authority in favour of the development of free speech and thought. Broadly speaking, Enlightenment science greatly valued empiricism and rational thought, and was embedded with the Enlightenment ideal of advancement and progress. As with most Enlightenment views, the benefits of science were not seen universally; Jean-Jacques Rousseau criticized the sciences for distancing man from nature and not operating to make people happier.

A gnome (/noʊm/) is a mythological creature and diminutive spirit in Renaissance magic and alchemy, introduced by Paracelsus in the 16th century and widely adopted by authors, including those of modern fantasy literature. They are typically depicted as small humanoids who live underground. Gnome characteristics are reinterpreted to suit various storytellers and artists.

Paracelsus's gnome is recognized to have derived from the German miners' legend about Bergmännlein or dæmon metallicus, the "metallurgical or mineralogical demon", according to Georg Agricola (1530), also called virunculus montanos (literal Latinization of Bergmännlein = "mountain manikin") by Agriocola in a later work (1549), and described by other names such as cobeli (sing. cobelus; Latinization of German Kobel). Agricola recorded that according to the legends of that profession, these mining spirits acted as miming and laughing pranksters who sometimes threw pebbles at miners, but could also reward them by depositing a rich vein of silver ore.

The occult (from Latin occultus 'hidden, secret') is a category of esoteric or supernatural beliefs and practices which generally fall outside the scope of organized religion and science, encompassing phenomena involving a 'hidden' or 'secret' agency, such as magic and mysticism. It can also refer to paranormal ideas such as extra-sensory perception and parapsychology.

The term occult sciences was used in 16th-century Europe to refer to astrology, alchemy, and natural magic. The term occultism emerged in 19th-century France, among figures such as Antoine Court de Gébelin. It came to be associated with various French esoteric groups connected to Éliphas Lévi and Papus, and in 1875 was introduced into the English language by the esotericist Helena Blavatsky.

Western esotericism and the arts surveys documented intersections between Western esotericism—notably Hermeticism, Christian Kabbalah, Alchemy, and Astrology—and the visual arts, literature, and the performing arts from the late Middle Ages to the present. Scholarship highlights recurring vectors: Renaissance and early modern image–text programmes (emblems, alchemical series, Kabbalistic diagrams) that formalised "operative images"; encyclopedic displays and diagrams in early modern erudition; nineteenth-century Spirit photography and related "psychic" image technologies; fin de siècle milieux linking occult orders with salon culture; early twentieth-century abstraction tied to Theosophy/Anthroposophy; ritual poetics on stage and in experimental film; and later artist-authored Tarot and neo-alchemical process art.

Aby Warburg's reading of the Palazzo Schifanoia frescoes in Ferrara established a foundational model for interpreting astrological programs in Renaissance art, while Barbara Obrist documented the late-medieval shift toward serial illustration and diagrammatic representation in alchemical manuscripts. Early modern encyclopedic projects—epitomized by Athanasius Kircher—wove hieroglyphs, cosmology, and spectacular display into ambitious image-systems that influenced the period's visual culture. In parallel, historians of science and craft have emphasized how chymistry's "wider worlds" intersected with literature, theatre, and the visual arts. Classic studies have traced how esoteric metaphysics and "spiritual" aesthetics contributed to early abstraction (e.g., Wassily Kandinsky and Hilma af Klint), while recent scholarship reassesses the role of Spiritualism/Spiritism within abstract art and Surrealism's image-making and poetics.

Lynn Thorndike (24 July 1882, in Lynn, Massachusetts, US – 28 December 1965, New York City) was an American historian of medieval science and alchemy. He was the son of a clergyman, Edward R. Thorndike, and the younger brother of Ashley Horace Thorndike, an American educator and expert on William Shakespeare, and Edward Lee Thorndike, known for being the father of modern educational psychology.

In A Short History of Civilization (1926), Thorndike was the first historian to propose the term "early modern" to describe what is today recognized as the early modern period, about 1500–1800.

Chlorine is a chemical element; it has symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the revised Pauling scale, behind only oxygen and fluorine.

Chlorine played an important role in the experiments conducted by medieval alchemists, which commonly involved the heating of chloride salts like ammonium chloride (sal ammoniac) and sodium chloride (common salt), producing various chemical substances containing chlorine such as hydrogen chloride, mercury(II) chloride (corrosive sublimate), and aqua regia. However, the nature of free chlorine gas as a separate substance was only recognised around 1630 by Jan Baptist van Helmont. Carl Wilhelm Scheele wrote a description of chlorine gas in 1774, supposing it to be an oxide of a new element. In 1809, chemists suggested that the gas might be a pure element, and this was confirmed by Sir Humphry Davy in 1810, who named it after the Ancient Greek χλωρός (khlōrós, "pale green") because of its colour.

The ouroboros (/ˌʊərəˈbɒrəs/) or uroboros (/ˌjʊərəˈbɒrəs/) is an ancient symbol depicting a snake or dragon eating its own tail. The ouroboros entered Western tradition via ancient Egyptian iconography and the Greek magical tradition. It was adopted as a symbol in Gnosticism and Hermeticism and, most notably, in alchemy. Some snakes, such as rat snakes, have been known to consume themselves.

The Aurora consurgens is an alchemical treatise of the 15th century famous for the rich illuminations that accompany it in some manuscripts. While in the last century, the text has been more commonly referred to as "Pseudo-Aquinas", there are as well arguments in favour of Thomas Aquinas, to whom it has originally been attributed in some manuscripts. The translated title from Latin into English is "Rising dawn."

Chinese alchemy (煉丹術 liàndānshù "method for refining cinnabar") is a historical Chinese approach to alchemy. According to original texts such as the Cantong qi, the body is understood as the focus of cosmological processes summarized in the five agents of change, or Wuxing, the observation and cultivation of which leads the practitioner into alignment and harmony with the Tao. Therefore, the traditional view in China is that alchemy focuses mainly on longevity and the purification of one's spirit, mind and body, providing, health, longevity and wisdom, through the practice of Qigong and wuxingheqidao. The consumption and use of various concoctions known as alchemical medicines or elixirs, each of which having different purposes but largely were concerned with immortality.

Pao zhi (炮制; Pao chi) or Processing (Chinese materia medica) is used in Traditional Chinese Medicine, such as honey or wine frying and roasting with toxic metals such as mercury, lead, and arsenic.

Alchemy in the medieval Islamic world refers to both traditional alchemy and early practical chemistry (the early chemical investigation of nature in general) by Muslim scholars in the medieval Islamic world. The word alchemy was derived from the Arabic word الكيمياء (al-kīmyāʾ), which itself may derive either from the Egyptian word kemi ('black') or from the Greek word khumeia ('fusion').

After the fall of the Western Roman Empire and the Islamic conquest of Roman Egypt, the focus of alchemical development moved to the Caliphate and the Islamic civilization.

In alchemy, the term chrysopoeia (from Ancient Greek χρυσοποιία (khrusopoiía) 'gold-making') refers to the artificial production of gold, most commonly by the alleged transmutation of base metals such as lead.

A related term is argyropoeia (from Ancient Greek ἀργυροποιία (arguropoiía) 'silver-making'), referring to the artificial production of silver, often by transmuting copper. Although alchemists pursued many different goals, the making of gold and silver remained one of the defining ambitions of alchemy throughout its history, from Zosimus of Panopolis (c. 300) to Robert Boyle (1627–1691).

The elixir of life (Medieval Latin: elixir vitae), also known as elixir of immortality, is a potion that supposedly grants the drinker eternal life and/or eternal youth. This elixir was also said to cure all diseases. Alchemists in various ages and cultures sought the means of formulating the elixir.

A panacea (/pænəˈsiːə/) is any supposed remedy that is claimed (for example) to cure all diseases and prolong life indefinitely. Named after the Greek goddess of universal remedy Panacea, it was in the past sought by alchemists in connection with the elixir of life and the philosopher's stone, a mythical substance that would enable the transmutation of common metals into gold.Through the 18th and 19th centuries, many "patent medicines" were claimed to be panaceas, and they became very big business.The term "panacea" is used in a negative way to describe the overuse of any one solution to solve many different problems, especially in medicine. The word has acquired connotations of snake oil and quackery.

A panacea (or panaceum) is also a literary term to represent any solution to solve all problems related to a particular issue.

In alchemy, the Magnum Opus or Great Work is a term for the process of working with the prima materia to create the philosopher's stone. It has been used to describe personal and spiritual transmutation in the Hermetic tradition, attached to laboratory processes and chemical color changes, used as a model for the individuation process, and as a device in art and literature. The magnum opus has been carried forward in New Age and neo-Hermetic movements which sometimes attached new symbolism and significance to the processes. The original process philosophy has four stages:

• nigredo, the blackening or melanosis
• albedo, the whitening or leucosis
• citrinitas, the yellowing or xanthosis
• rubedo, the reddening, purpling, or iosis

The origin of these four phases can be traced at least as far back as the first century. Zosimus of Panopolis wrote that it was known to Mary the Jewess. The development of black, white, yellow, and red can also be found in the Physika kai Mystika of Pseudo-Democritus, which is often considered to be one of the oldest books on alchemy. After the 15th century, many writers tended to compress citrinitas into rubedo and consider only three stages. Other color stages are sometimes mentioned, most notably the cauda pavonis (peacock's tail) in which an array of colors appear.