[Water is] the only drink for a wise man.

I am never afraid of what I know.

To establish oneself in the world, one has to do all one can to appear established.

A man may well bring a horse to the water but he cannot make him drink.

The good or ill of a man lies within his own will.

It is a mistake to regard age as a downhill grade toward dissolution. The reverse is true. As one grows older, one climbs with surprising strides.

Our feelings are our most genuine paths to knowledge.

To will is to select a goal, determine a course of action that will bring one to that goal, and then hold to that action till the goal is reached. The key is action.

Good breeding consists of concealing how much we think of ourselves and how little we think of the other person.

[Medicine is] a collection of uncertain prescriptions the results of which, taken collectively, are more fatal than useful to mankind.