The books that the world calls immoral are books that show the world its own shame.
To every action there is always an equal and opposite or contrary, reaction
There is nothing more awful, insulting, and depressing than banality.
Better know nothing than half-know many things.
When you know better you do better.
Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.
The only true wisdom is in knowing you know nothing.
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.
Just because I don't care doesn't mean I don't understand.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
A child miseducated is a child lost.
Reading is to the mind what exercise is to the body.
The most important part of teaching is to teach what it is to know.
Reading without reflecting is like eating without digesting.
Education is the kindling of a flame, not the filling of a vessel.
No man's knowledge here can go beyond his experience.
The highest activity a human being can attain is learning for understanding, because to understand is to be free.
Men are born ignorant, not stupid. They are made stupid by education.
The reading of all good books is like conversation with the finest men of past centuries.