In mathematics you don't understand things. You just get used to them.
It is possible to fly without motors, but not without knowledge and skill.
Evil being the root of mystery, pain is the root of knowledge.
Industrialize or perish.
Free the child's potential, and you will transform him into the world.
Education is the ability to listen to almost anything without losing your temper or your self-confidence.
Books are for people who wish they were somewhere else.
What sculpture is to a block of marble, education is to a human soul.
The progressive development of man is vitally dependent on invention.
The task of a writer is not to solve the problem but to state the problem correctly.
Never help a child with a task at which he feels he can succeed.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
What is freedom of expression? Without the freedom to offend, it ceases to exist.
What we know is a drop, what we don't know is an ocean.
The reading of all good books is like conversation with the finest men of past centuries.
I decided to teach because I think that any person who studies philosophy has to be involved actively.
When you know better you do better.
They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.
A witty saying proves nothing.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
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.
