Bis dat, qui cito dat. - Erasmus

Do not be guilty of possessing a library of learned books while lacking learning yourself.

Like the body the soul can be healthy, youthful, and so on. It can undergo pain, thirst, and hunger. In this physical life, that is, in the visible world, we avoid whatever would defile or deform the body; how much more, then, ought we to avoid that which would tarnish the soul?

In living bodies, how all the various limbs harmonize, and mutually combine, for common defence against injury! What can be more heterogeneous, and unlike, than the body and the soul? and yet with what strong bonds nature has united them, is evident from the pang of separation. As life itself is nothing else but the concordant union of body and soul, so is health the harmonious cooperation of all the parts and functions of the body.