In the world we live in, one fool makes many fools, but one sage only a few sages.

Everyone is perfectly willing to learn from unpleasant experience - if only the damage of the first lesson could be repaired.

An hour-glass is a reminder not only of time's quick flight, but also of the dust to which we must at last return

A clever child brought up with a foolish one can itself become foolish. Man is so perfectible and corruptible he can become a fool through good sense.

Everyone is a genius at least once a year. The real geniuses simply have their bright ideas closer together.

With God thoughts are colors, with us they are pigments-even the most abstract one may be accompanied by physical pain.

Perhaps in time the so-called Dark Ages will be thought of as including our own.