Excerp From Phaedo

Must not genuine philosophers find themselves holding the sort of belief which will lead then to say, one to another, something like this: 'It would seem that we are guided as it were along a track to our goal by the fact that, so long as we have the body accompanying out reason in its inquiries, so long as our souls are befouled by this evil admixture, we shall assuredly never fully possess that which we desire, to wit truth. For by reason of the nurture which we must have, the body makes countless demands upon us, and furthurmore any sickness that may befall it hampers our pursuit of true being. Then too it fills us with desires and longings and fears and imaginations of all sorts, and such quantities of trash, that, as the common saying puts it, we really never have a moment to think about anything because of the body.'

-Socrates