Plato—Disciple of Socrates, teacher of Aristotle, and a prolific writer (427-347 BC). Almost all that is known about Socrates comes from Plato's works. A Platonic doctrine that resembles the Bhagavad-gītā philosophy of the three modes of material nature is the care of the soul. The soul is said to work within the body through three faculties: appetite, spiritedness and reason. The appetitive faculty is lowest of the three. It consists of the drives for physical enjoyment (of food and sex) and for the avoidance of pain. Thums, or spiritedness, is the middle faculty. It is excitable, aggressive and pugnacious, and seeks adventure and honor. Highest is the faculty of reason. It expresses itself as inquiry and as worthy activity. Reason seeks beauty, truth and goodness. The appetites can be compared to a herd of sheep, spiritedness to a sheepdog, and reason to a shepherd. Care of the soul means to keep the three faculties in harmony, so that they don't meddle in one another's purpose. The purpose of appetite is to see that the body is properly cared for. Spiritedness's purpose is to fight fear and complacency. The purpose of reason is impose order upon the other two, to maintain harmony, and to care for the soul. Reason gets its sense of correct order and harmony by contemplation of the Good, described as a realm of eternal, unchanging thought-forms. When reason harmonizes human life with the Good, the soul is freed from human ignorance and suffering. British philosopher A.N. Whitehead (1861-1947) said the whole history of Western philosophy consists of nothing more than footnotes to Plato. See Idealism. Plotinus Plotinus lived in Egypt and Rome some two centuries after Christ (204-270 AD) and is the founder of the Neoplatonist school of Greek philosophy. As a young man in Alexandria, he learned philosophy under Ammonius Saccas. There is speculation that Ammonius Saccus was originally from India. Plotinus tried to visit India but failed. Back in the Mediterranean world, he taught that the soul is eternal and transmigrates from body to body (reincarnation). The gradation of species of living entities emanates from the impersonal spiritual essence, God. The philosophical soul gradually ascends to that essence and merges into it. Neoplatonism had a strong influence on the early Christian church. See Mysticism, Plato.