14. Returning now to the earlier stage of human thought which is represented by the writings of Plato, we find that many of the same questions have already arisen: there is the same tendency to materialism; the same inconsistency in the application of the idea of mind; the same doubt whether the soul is to be regarded as a cause or as an effect; the same falling back on moral convictions. In the Phaedo the soul is conscious of her divine nature, and the separation from the body which has been commenced in this life is perfected in another. Beginning in mystery, Socrates, in the intermediate part of the Dialogue, attempts to bring the doctrine of a future life into connection with his theory of knowledge. In proportion as he succeeds in this, the individual seems to disappear in a more general notion of the soul; the contemplation of ideas 'under the form of eternity' takes the place of past and future states of existence. His language may be compared to that of some modern philosophers, who speak of eternity, not in the sense of perpetual duration of time, but as an ever-present quality of the soul. Yet at the conclusion of the Dialogue, having 'arrived at the end of the intellectual world' (Republic), he replaces the veil of mythology, and describes the soul and her attendant genius in the language of the mysteries or of a disciple of Zoroaster. Nor can we fairly demand of Plato a consistency which is wanting among ourselves, who acknowledge that another world is beyond the range of human thought, and yet are always seeking to represent the mansions of heaven or hell in the colours of the painter, or in the descriptions of the poet or rhetorician.