Socrates About Spirits
The matter of spirit entered a new phase with Socrates, who proved to be a turning point in ancient Greek philosophy. Socrates freed the spirit from the narrow frame of matter and physicality, and adopted a much wider approach to it. His pupil Plato explains the views of his master in his book Phaidon as follows:
God is the source of wisdom Who encompasses all things, and the Spirit and Intellect of the whole universe. The human body is composed of material elements, while the spirit is an individual manifestation of the Universal Spirit. The spirit controls the body in a way similar to God, being invisible, and ruling the whole universe. When one day the body decomposes, the spirit remains eternally.
God alone knows whether these considerations totally belong to Socrates or if Plato added his ideas to them.