Immortality in the context of "Tree (mythology)"

In Greek mythology, ichor (/ˈaɪkər/) is the ethereal fluid making up the blood of the gods and/or immortals. The Ancient Greek word ἰχώρ (ikhṓr) is of uncertain etymology, and has been suggested to be a foreign word, possibly the pre-Greek substrate.

Life is matter that has biological processes, such as signaling and the ability to sustain itself. It is defined descriptively by the capacity for homeostasis, organisation, metabolism, growth, adaptation, response to stimuli, and reproduction. All life over time eventually reaches a state of death, and none is immortal. Many philosophical definitions of living systems have been proposed, such as self-organizing systems. Defining life is further complicated by viruses, which replicate only in host cells, and the possibility of extraterrestrial life, which is likely to be very different from terrestrial life. Life exists all over the Earth in air, water, and soil, with many ecosystems forming the biosphere. Some of these are harsh environments occupied only by extremophiles. The life in a particular ecosystem is called its biota.

Life has been studied since ancient times, with theories such as Empedocles's materialism asserting that it was composed of four eternal elements, and Aristotle's hylomorphism asserting that living things have souls and embody both form and matter. Life originated at least 3.5 billion years ago, resulting in a universal common ancestor. This evolved into all the species that exist now, by way of many extinct species, some of which have left traces as fossils. Attempts to classify living things, too, began with Aristotle. Modern classification began with Carl Linnaeus's system of binomial nomenclature in the 1740s.

A nymph (Ancient Greek: νύμφη, romanized: nýmphē; Attic Greek: [nýmpʰɛː]; sometimes spelled nymphe) is a minor female nature deity in ancient Greek folklore. Distinct from other Greek goddesses, nymphs are generally regarded as personifications of nature; they are typically tied to a specific place, landform, or tree, and are usually depicted as maidens. Because of their association with springs, they were often seen as having healing properties; other divine powers of the nymphs included divination and shapeshifting. In spite of their divine nature, they were not immortal.

Nymphs are divided into various broad subgroups based on their habitat, such as the Meliae (ash tree nymphs), the Dryads (oak tree nymphs), the Alseids (grove nymphs), the Naiads (spring nymphs), the Nereids (sea nymphs), the Oceanids (ocean nymphs), and the Oreads (mountain nymphs). Other nymphs included the Hesperides (evening nymphs), the Hyades (rain nymphs), and the Pleiades (companions of Artemis).

The soul is the purported immaterial aspect or essence of a living being. It is typically believed to be immortal and to exist apart from the material world. The three main theories that describe the relationship between the soul and the body are interactionism, parallelism, and epiphenomenalism. Anthropologists and psychologists have found that most humans are naturally inclined to believe in the existence of the soul and that they have interculturally distinguished between souls and bodies.

The soul has been the central area of interest in philosophy since ancient times. Socrates envisioned the soul to possess a rational faculty, its practice being man's most godlike activity. Plato believed the soul to be the person's real self, an immaterial and immortal dweller of our lives that continues and thinks even after death. Aristotle sketched out the soul as the "first actuality" of a naturally organized body—form and matter arrangement allowing natural beings to aspire to full actualization.

In ancient Greek religion and mythology, Hebe (/ˈhiːbiː/; Ancient Greek: Ἥβη, lit. 'youth') is the goddess of youth or of the prime of life. She was the cup-bearer for the gods of Mount Olympus, serving their nectar and ambrosia. On Sicyon, she was worshipped as a goddess of forgiveness or mercy. She was often given the epithet Ganymeda ('Gladdening Princess').

Hebe is a daughter of Zeus and Hera, and the divine wife of Heracles (Roman equivalent: Hercules). She had influence over eternal youth and the ability to restore youth to mortals, a power that appears exclusive to her, as in Ovid's Metamorphoses, some gods lament the aging of their favoured mortals. According to Philostratus the Elder, Hebe was the youngest of the gods and the one responsible for keeping them eternally young, and thus was the most revered by them. Her role of ensuring the eternal youth of the other gods is appropriate to her role of serving as cup-bearer, as the word ambrosia has been linked to a possible Proto-Indo-European translation related to immortality, undying, and lifeforce. In art, she is typically depicted with her father in the guise of an eagle, often offering a cup to him. Her equivalent Roman goddess is Juventas.

The Republic (Ancient Greek: Πολιτεία, romanized: Politeia; Latin: De Republica) is a Socratic dialogue authored by Plato around 375 BC, concerning justice (dikaiosúnē), the order and character of the just city-state, and the just man. It is Plato's best-known work, and one of the world's most influential works of philosophy and political theory, both intellectually and historically.

In the dialogue, Socrates discusses with various Athenians and foreigners the meaning of justice and whether the just man is happier than the unjust man. He considers the natures of existing regimes and then proposes a series of hypothetical cities in comparison, culminating in Kallipolis (Καλλίπολις), a utopian city-state ruled by a class of philosopher-kings. They also discuss ageing, love, theory of forms, the immortality of the soul, and the role of the philosopher and of poetry in society. The dialogue's setting seems to be the time of the Peloponnesian War.

In polytheistic religions and mythologies, a demigod or demigoddess is a being half-divine and half-human born of a deity and a human, or a human or non-human creature that is accorded divine status after death, or someone who has attained the "divine spark" (divine illumination). An immortal demigod often has tutelary status and a religious cult following, while a mortal demigod is one who has fallen or died, but is popular as a legendary hero. Figuratively, the term is used to describe a person whose talents or abilities are so elevated that they appear to approach divinity.

Resurrection or anastasis is the concept of coming back to life after death. This is quite different from reincarnation, a process involving a person or deity returning to life in a different body. The disappearance of a body is another similar but distinct belief in some religions.

With the advent of written records, the earliest known recurrent theme of resurrection was in Egyptian and Canaanite religions, which had cults of dying-and-rising gods such as Osiris and Baal. Ancient Greek religion generally emphasised immortality, but in the mythos, a number of individuals were made physically immortal as they were resurrected from the dead.