As he thinketh in his heart, so is he.

No amount of evidence will ever persuade an idiot.

A man is as big as the measure of his thinking.

Drag your thoughts away from your troubles… by the ears, by the heels, or any other way you can manage it.

The world is a comedy to those that think, and a tragedy to those that feel.

When we see men of worth, we should think of equaling them; when we see men of a contrary character, we should turn inwards and examine ourselves.

Appearances to the mind are of four kinds. Things either are what they appear to be; or they neither are, nor appear to be; or they are, and do not appear to be; or they are not, and yet appear to be. Rightly to aim in all these cases is the wise man’s task.

There is one thing stronger than all the armies in the world; and that is an idea whose time has come.