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.
Evil being the root of mystery, pain is the root of knowledge.
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.
A little knowledge is a dangerous thing. So is a lot.
Dare to think for yourself.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
I have no special talents. I am only passionately curious.
No power and no treasure can outweigh the extension of our knowledge.
Science is a way of thinking much more than it is a body of knowledge.
It is possible to fly without motors, but not without knowledge and skill.
Seek knowledge from the cradle to the grave.
An investment in knowledge pays the best interest.
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.
Knowing others is wisdom, knowing yourself is Enlightenment.
A little knowledge that acts is worth infinitely more than much knowledge that is idle.
Educate the children and it won't be necessary to punish the men.
Knowing is not enough; we must apply. Willing is not enough; we must do.
The books that the world calls immoral are books that show the world its own shame.
I am indebted to my father for living, but to my teacher for living well.
A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.
Liberty without Learning is always in peril and Learning without Liberty is always in vain.