The only good is knowledge and the only evil is ignorance.

Education is an admirable thing, but it is well to remember from time to time that nothing that is worth knowing can be taught.

It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.

Science is a way of thinking much more than it is a body of knowledge.

Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.

What we know is a drop, what we don't know is an ocean.

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

Common sense is the collection of prejudices acquired by age eighteen.

Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.

I learned very early the difference between knowing the name of something and knowing something.

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

All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.

Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.

There is no authority who decides what is a good idea.

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

The progressive development of man is vitally dependent on invention.

Civilization is a race between disaster and education.

The knowledge of all things is possible

Knowing others is wisdom, knowing yourself is Enlightenment.

Show me a family of readers, and I will show you the people who move the world.

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