No man has any natural authority over his fellow men.

When prosperity comes, do not use all of it.

A perfection of means, and confusion of aims, seems to be our main problem.

I know I am but mortal and so therewhilst prepare myself for death, whensoever it shall please God to send it.

The most certain sign of wisdom is cheerfulness.

Creativity is the greatest rebellion in existence.

One must wait until the evening to see how splendid the day has been.

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

The absent are never without fault, nor the present without excuse.

We must live together as brothers or perish together as fools.

The greatest power we have is the power of choice.

Fear doesn't exist anywhere except in the mind.

What's done can't be undone.

The trouble with most of us is that we would rather be ruined by praise than saved by criticism.

If you don't know where you're from, you'll have a hard time saying where you're going.

Men are not prisoners of fate, but only prisoners of their own minds.

Without courage, wisdom bears no fruit.

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

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

Life's battles don't always go to the stronger or faster man. But sooner or later, the man who wins is the man who thinks he can.

The difference between stupidity and genius is that genius has its limits.