Learning acquired in youth arrests the evil of old age.

Art is never finished, only abandoned.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.

Realize that everything connects to everything else.

Avoid the precepts of those thinkers whose reasoning is not confirmed by experience.

How painting surpasses all human works by reason of the subtle possibilities which it contains.

O sleepers! what a thing is slumber! Sleep resembles death. Ah, why then dost thou not work in such wise as that after death thou mayst retain a resemblance to perfect life, when, during life, thou art in sleep so like to the hapless dead?