Que el alimento sea tu medicina y tu medicina sea tu alimento. - Hippocrates

There are in fact two things, science and opinion; the former begets knowledge, the latter ignorance.

Timidity betrays want of powers, and audacity a want of skill. There are, indeed, two things, knowledge and opinion, of which the one makes its possessor really to know, the other to be ignorant.

All parts of the body which have a function, if used in moderation and exercised in labors in which each is accustomed, become thereby healthy, well developed and age more slowly, but if unused they become liable to disease, defective in growth and age quickly.