Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.

What a man does for others, not what they do for him, gives him immortality.

Tell the truth. Sing with passion. Work with laughter. Love with heart. 'Cause that's all that matters in the end.

The ultimate authority must always rest with the individual's own reason and critical analysis.

Criticize the act, not the person.

There is an art, or rather a knack to flying. The knack lies in learning how to throw yourself at the ground and miss.

Those who know, do. Those that understand, teach.

Nothing is softer or more flexible than water, yet nothing can resist it.

There is geometry in the humming of the strings. There is music in the spacing of the spheres.

Whatever the mind of man creates, should be controlled by man's character

When you judge another, you do not define them, you define yourself.

The first thing you'll have to do, is the last thing you wished.

Experience teaches us that it is much easier to prevent an enemy from posting themselves than it is to dislodge them after they have got possession.

To do great things is difficult, but to command great things is more difficult.

There are things known and there are things unknown, and in between are the doors of perception.

Do your little bit of good where you are; it's those little bits of good put together that overwhelm the world.

He alone is free who lives with free consent under the entire guidance of reason.

A person who spends more than he earns is a fool

In order to change the world, you have to get your head together first

Rational discussion is useful only when there is a significant base of shared assumptions.