He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

Nobody made a greater mistake than he who did nothing because he could do only a little.

Share our similarities, celebrate our differences.

I think, therefore I am.

Power always thinks it has a great soul and vast views beyond the comprehension of the weak.

To a wise and good man the whole earth is his fatherland.

You always admire what you really don't understand.

What a liberation to realize that the “voice in my head” is not who I am. Who am I then? The one who sees that.

But the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.

To be wronged is nothing unless you continue to remember it.

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

Happiness is not an ideal of reason, but of imagination.

We seldom realize, for example that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society.

It’s your road and yours alone. Others may walk it with you, but no one can walk it for you.

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

Each problem that I solved became a rule which served afterwards to solve other problems.

This is something basic to be understood: the ego must come to a peak, it must be strong, it must have attained an integrity only then can you dissolve it.

In anger we should refrain both from speech and action.

The only limit to our realization of tomorrow will be our doubts of today.

Good advice is always certain to be ignored, but that's no reason not to give it.

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