That men do not learn very much from the lessons of history is the most important of all the lessons that history has to teach.
There is no authority who decides what is a good idea.
The deepest sin against the human mind is to believe things without evidence.
Education is the ability to listen to almost anything without losing your temper or your self-confidence.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
Reading is to the mind what exercise is to the body.
If I have seen further it is by standing on the shoulders of Giants.
A thought is an idea in transit.
I am indebted to my father for living, but to my teacher for living well.
Seek knowledge from the cradle to the grave.
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.
What is now proved was once only imagined.
In mathematics you don't understand things. You just get used to them.
If there were no bad people, there would be no good lawyers.
You can never be overdressed or overeducated.
Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.
Action not backed by knowledge and knowledge not translatable into action, both can not stand the test of time.
Knowing others is wisdom, knowing yourself is Enlightenment.
The reading of all good books is like conversation with the finest men of past centuries.
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.