Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.

Science is not only a disciple of reason but, also, one of romance and passion.

The first principle is that you must not fool yourself and you are the easiest person to fool.

The ability to observe without evaluating is the highest form of intelligence.

Knowing others is wisdom, knowing yourself is Enlightenment.

No man's knowledge here can go beyond his experience.

I cannot teach anybody anything. I can only make them think

Civilization is a race between disaster and education.

The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.

No power and no treasure can outweigh the extension of our knowledge.

Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.

Never help a child with a task at which he feels he can succeed.

The whole of science is nothing more than a refinement of everyday thinking.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

What sculpture is to a block of marble, education is to a human soul.

Imagination is more important than knowledge.

Men are born ignorant, not stupid. They are made stupid by education.

Patience is a virtue, and I'm learning patience. It's a tough lesson.

Human behavior flows from three main sources: desire, emotion, and knowledge

Educate the children and it won't be necessary to punish the men.

It isn't what we don't know that gives us trouble, it's what we know that ain't so.