The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

It is man that makes truth great, not truth that makes man great.

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.

Wisdom begins at the end.

Sometimes one creates a dynamic impression by saying something, and sometimes one creates as significant an impression by remaining silent.

Fear doesn't exist anywhere except in the mind.

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

An intelligent hell would be better than a stupid paradise.

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

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

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

The secret of life, though, is to fall seven times and to get up eight times.

Real knowledge is to know the extent of one's ignorance.

In moments of great grief, that’s where you look and immerse yourself. You realise you are not immortal, you are not a god, you are part of the natural world and you come to accept that.

I don't like definitions, but if there is a definition of freedom, it would be when you have control over your reality to transform it, to change it, rather than having it imposed upon you. You can't really ask for more than that.

Intelligence is the ability to adapt to change.

In the practice of tolerance, one's enemy is the best teacher.

Great acts are made up of small deeds.

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

The very essence of instinct is that it's followed independently of reason.

When prosperity comes, do not use all of it.