But how could our thinking insight sit in judgment on the declarations of the senses, unless there were something living within it which transcends sense-perception? Therefore the truth or falsity in things is decided by something within us which opposes the physical body and is consequently not subject to its laws. First of all, it cannot be subject to the laws of growth and decay. For this something contains truth within it. Now truth cannot have a yesterday and a to-day, it cannot be one thing one day and another the next, like objects of sense. Therefore truth must be something eternal. And when the philosopher turns away from the perishable things of sense and towards truth, he is turning towards an eternal element that lives within him. If we immerse ourselves wholly in spirit, we shall live wholly in truth. The things of sense around us are no longer present merely in their physical form. "And he accomplishes this most perfectly," says Socrates, "who approaches everything as much as possible with the spirit only, without either looking round when he is thinking, or letting any other sense interrupt his reflecting; but who, making use of pure thought only, strives to grasp everything as it is in itself, separating it as much as possible from eyes and ears, in short from the whole body, which only disturbs the soul and does not allow it to attain truth and insight when associated with the soul.... Now is not death the release and separation of the soul from the body? And it is only true philosophers who are always striving to release the soul as far as they can. This, therefore, is the philosopher's vocation, to deliver and separate the soul from the body.... Therefore it would be foolish if a man, who all his life has taken measures to be as near death as possible, should, when it comes, rebel against it.... In truth the real seekers after wisdom aspire to die, and of all men they are those who least fear death." Moreover Socrates bases all higher morality on liberation from the body. He who only follows what his body ordains is not moral. Who is valiant? asks Socrates. He is valiant who does not obey his body but the demands of his spirit when these demands imperil the body. And who is temperate? Is not this he who "does not let himself be carried away by desires, but who maintains an indifferent and moral demeanour with regard to them. Therefore are not those alone temperate who set least value on the body and live in the love of wisdom?" And so it is, in the opinion of Socrates, with all virtues.