Philosophy then persuades the soul to withdraw from the senses in so far as it is not compelled to use them and bids the soul to gather itself together by itself, to trust only itself and whatever reality, existing by itself, the soul by itself understands, Phaedo and not to consider as true whatever it examines by other means, for this is different in different circumstances and is sensible and visible, whereas what the soul itself sees is intelligible and invisible.