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

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.

Knowledge, Action, Devotion are complementary to each other.

Real learning comes about when the competitive spirit has ceased.

The knowledge of all things is possible

The schools ain't what they used to be and never was.

Knowledge becomes evil if the aim be not virtuous.

Reading without reflecting is like eating without digesting.

One test of the correctness of educational procedure is the happiness of the child.

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

Industrialize or perish.

When I am attacked by gloomy thoughts, nothing helps me so much as running to my books. They quickly absorb me and banish the clouds from my mind.

A child miseducated is a child lost.

The task of a writer is not to solve the problem but to state the problem correctly.

The progressive development of man is vitally dependent on invention.

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

A thought is an idea in transit.

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

Learning never exhausts the mind.

An investment in knowledge pays the best interest.

A cynic is a man who knows the price of everything, and the value of nothing.