Common sense is in spite of, not as the result of education.

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

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

The essence of knowledge is, having it, to apply it; not having it, to confess your ignorance.

Nothing is as easy as it looks.

If you would take, you must first give, this is the beginning of intelligence.

Think globally, act locally.

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

Be curious, not judgmental.

Gravity is only the bark of wisdom's tree; but it preserves it

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

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

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

If you only read the books that everyone else is reading, you can only think what everyone else is thinking.

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

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

It is the mark of an educated mind to be able to entertain a thought without accepting it.

Attachment is the great fabricator of illusions; reality can be attained only by someone who is detached.

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

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

The simple things are also the most extraordinary things, and only the wise can see them.