Investigate, educate and organize.

If the facts don't fit the theory, change the facts.

Just when I thought there wasn't room enough for another thought in my head, I had this great idea.

In order to stave off covetouness, greed, and spite, citizens world over must be educated.

The books that the world calls immoral are books that show the world its own shame.

I have no special talents. I am only passionately curious.

I do not know how to teach philosophy without becoming a disturber of the peace.

Dare to think for yourself.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

Investigate, educate and organize the country must progress, productive works and industries are the main avenues at present next to education for the advancement of the country

Industrialize or perish.

Seek knowledge from the cradle to the grave.

Science is what we have learned about how to keep from fooling ourselves.

The more I read, the more I acquire, the more certain I am that I know nothing.

Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.

There is nothing more awful, insulting, and depressing than banality.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

I cannot live without books.

The most savage controversies are those about matters as to which there is no good evidence either way.

Most people have never learned that one of the main aims in life is to enjoy it.

As we acquire more knowledge, things do not become more comprehensible but more mysterious.