You can best serve civilization by being against what usually passes for it.

Without courage, wisdom bears no fruit.

I mistrust the judgement of every man in a case in which his own wishes are concerned.

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

Where there is anger, there is always pain underneath.

Science may set limits to knowledge, but should not set limits to imagination.

A house divided against itself cannot stand.

There are two educations. One should teach us how to make a living and the other how to live.

It takes a lot of courage to show your dreams to someone else.

If you are neutral in situations of injustice, you have chosen the side of the oppressor.

So many people have this idea: I want to achieve something great or be somebody great. And they neglect the step that leads to greatness. They don't honor this step at this moment because they have this idea of some future moment where they are going to be great.

Obsession is the wellspring of genius and madness.

What you're thinking is what you're becoming.

The use of travelling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are.

Fine clothes may disguise, but silly words will disclose a fool.

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

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them.

Be sure you put your feet in the right place, then stand firm.

By three methods we may learn wisdom: first, by reflection which is noblest; second, by imitation, which is the easiest; and third, by experience, which is the bitterest.

To avoid criticism say nothing, do nothing, be nothing.