The highest activity a human being can attain is learning for understanding, because to understand is to be free.
If you want the present to be different from the past, study the past.
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.
There is nothing more awful, insulting, and depressing than banality.
In mathematics you don't understand things. You just get used to them.
A spirit of national masochism prevails, encouraged by an effete corps of impudent snobs who characterize themselves as intellectuals.
Many much-learned men have no intelligence.
Those who fail to learn the lessons of history are doomed to repeat them.
Intelligence plus character-that is the goal of true education.
The only good is knowledge and the only evil is ignorance.
A little knowledge is a dangerous thing. So is a lot.
The deepest sin against the human mind is to believe things without evidence.
Men are born ignorant, not stupid. They are made stupid by education.
Medicine is my lawful wife and literature my mistress; when I get tired of one, I spend the night with the other.
Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.
Science is not only a disciple of reason but, also, one of romance and passion.
The man who is fond of books is usually a man of lofty thought, and elevated opinions.
To educate a person in the mind but not in morals is to educate a menace to society.
Seek knowledge from the cradle to the grave.
The real solution lies in a world in which charity will have become unnecessary.
The great difficulty in education is to get experience out of ideas.