Sutra in the context of "Yoga Sutras of Patanjali"

Usury (/ˈjuːʒəri/) is the practice of making loans that are seen as unfairly enriching the lender. The term may be used in a moral sense—condemning taking advantage of others' misfortunes—or in a legal sense, where an interest rate is charged in excess of the maximum rate that is allowed by law. A loan may be considered usurious because of excessive or abusive interest rates or other factors defined by the laws of a state. Someone who practises usury can be called a usurer, but in modern colloquial English may be called a loan shark.

In many historical societies including ancient Christian, Jewish, and Islamic societies, usury meant the charging of interest of any kind, and was considered wrong, or was made illegal. During the Sutra period in India (7th to 2nd centuries BC) there were laws prohibiting the highest castes from practising usury. Similar condemnations are found in religious texts from Buddhism, Judaism (ribbit in Hebrew), Christianity, and Islam (riba in Arabic). At times, many states from ancient Greece to ancient Rome have outlawed loans with any interest. Though the Roman Empire eventually allowed loans with carefully restricted interest rates, the Catholic Church in medieval Europe, as well as the Reformed Churches, regarded the charging of interest at any rate as sinful (as well as charging a fee for the use of money, such as at a bureau de change). Christian religious prohibitions on usury are predicated upon the belief that charging interest on a loan is a sin.

The National Treasure (国宝, kokuhō) refers to Tangible Cultural Properties designated by Japanese law as: “having exceptionally high value”. It applies to buildings, artworks, and crafts; selected from Important Tangible Cultural Properties by the Agency for Cultural Affairs (a special body of the Ministry of Education, Culture, Sports, Science and Technology). A Tangible Cultural Property is considered to be of historic or of artistic value, classified either as buildings and structures or as fine-arts and crafts. Each National Treasure must demonstrate outstanding workmanship, high value for world cultural history, or exceptional value for scholarship.

Approximately 20% of the National Treasures are structures such as castles, Buddhist temples, Shinto shrines, or residences. The remaining 80% include paintings, scrolls, sutras, calligraphy, sculptures in wood, bronze, lacquer or stone, as well as crafts such as pottery, lacquerware, metalworks, swords, textiles, and archaeological artifacts. The items span the period from ancient to early modern Japan before the Meiji period, including pieces of the world's oldest pottery from the Jōmon period and 19th-century documents and writings. The designation of the Akasaka Palace in 2009, the Tomioka Silk Mill in 2014, and the Kaichi School added three modern, post-Meiji Restoration National Treasures.

Indian mathematics emerged in the Indian subcontinent from 1200 BCE until the end of the 18th century. In the classical period of Indian mathematics (400 CE to 1200 CE), important contributions were made by scholars like Aryabhata, Brahmagupta, Bhaskara II, Varāhamihira, and Madhava. The decimal number system in use today was first recorded in Indian mathematics. Indian mathematicians made early contributions to the study of the concept of zero as a number, negative numbers, arithmetic, and algebra. In addition, trigonometrywas further advanced in India, and, in particular, the modern definitions of sine and cosine were developed there. These mathematical concepts were transmitted to the Middle East, China, and Europe and led to further developments that now form the foundations of many areas of mathematics.

Ancient and medieval Indian mathematical works, all composed in Sanskrit, usually consisted of a section of sutras in which a set of rules or problems were stated with great economy in verse in order to aid memorization by a student. This was followed by a second section consisting of a prose commentary (sometimes multiple commentaries by different scholars) that explained the problem in more detail and provided justification for the solution. In the prose section, the form (and therefore its memorization) was not considered so important as the ideas involved. All mathematical works were orally transmitted until approximately 500 BCE; thereafter, they were transmitted both orally and in manuscript form. The oldest extant mathematical document produced on the Indian subcontinent is the birch bark Bakhshali Manuscript, discovered in 1881 in the village of Bakhshali, near Peshawar (modern day Pakistan) and is likely from the 7th century CE.

Sanskrit Buddhist literature refers to Buddhist texts composed either in classical Sanskrit, in a register that has been called "Buddhist Hybrid Sanskrit" (also known as "Buddhistic Sanskrit" and "Mixed Sanskrit"), or a mixture of these two. Several non-Mahāyāna Nikāyas appear to have kept their canons in Sanskrit, the most prominent being the Sarvāstivāda school. Many Mahāyāna Sūtras and śāstras also survive in Buddhistic Sanskrit or in standard Sanskrit.

During the Indian Tantric Age (8th to the 14th century), numerous Buddhist Tantras were written in Sanskrit, sometimes interspersed with local languages like Apabhramśa, and often containing notable irregularities in grammar and meter.

Buddhist Hybrid Sanskrit (BHS) is a modern linguistic category applied to the language used in a class of Indian Buddhist texts, such as the Perfection of Wisdom sutras. BHS is classified as a Middle Indo-Aryan language. It is sometimes called "Buddhist Sanskrit" or "Mixed Sanskrit".

Charvaka (Sanskrit: चार्वाक; IAST: Cārvāka), also known as Lokāyata, is an ancient Indian school of materialism. It is an example of the atheistic schools in the Ancient Indian philosophies, dated 900 BCE. Charvaka holds direct perception, empiricism, and conditional inference as proper sources of knowledge, embraces philosophical skepticism, and rejects ritualism. In other words, the Charvaka epistemology states that whenever one infers a truth from a set of observations or truths, one must acknowledge doubt; inferred knowledge is conditional.

It was a well-attested belief system in ancient India. Brihaspati, a philosopher, is traditionally referred to as the founder of Charvaka or Lokāyata philosophy, although some scholars dispute this. Charvaka developed during the Hindu reformation period in the first millennium BCE and is considered a philosophical predecessor to subsequent or contemporaneous heterodox philosophies such as Ajñāna, Ājīvika, Jainism, and Buddhism. Its teachings have been compiled from historic secondary literature such as those found in the shastras, sutras, and Indian epic poetry.

The Brahma Sūtras (Sanskrit: ब्रह्मसूत्राणि), also known as the Vedanta Sūtra (Sanskrit: वेदान्त सूत्र), or as Shariraka Sūtra, and Bhikshu-sūtra (latter two in monastic traditions), are a Sanskrit text which criticizes the metaphysical dualism of the influential Samkhya philosophy, and instead synthesizes and harmonizes divergent Upanishadic ideas and practices about the essence of existence, postulating Brahman as the only origin and essence of everything. It is attributed to the sages Bādarāyaṇa, who is also called Vyāsa (arranger), but probably an accumulation of incremental additions and changes by various authors to an earlier work, completed in its surviving form in approx. 400–450 CE. The oldest version may be composed between 500 BCE and 200 BCE, with 200 BCE being the most likely date.

The Brahma Sūtras consist of 555 aphoristic verses (sutras) in four chapters, dealing with attaining knowledge of Brahman. Rejecting the smriti as a base of knowledge, it declares that the Vedic Upanishads are the only acceptable source of truth, infallible revelations describing the same metaphysical Reality, Brahman, which cannot be different for different people. The text attempts to synthesize and harmonize diverse and sometimes apparently conflicting vidyas ("knowledges") of, and upasanas (meditation, worship) of the essence of existence, stating they are actually synonyms for Brahman. It does so from a bhedabheda-perspective, arguing, as John Koller states: "that Brahman and Atman are, in some respects, different, but, at the deepest level, non-different (advaita), being identical."