The most savage controversies are those about matters as to which there is no good evidence either way.
To educate a person in the mind but not in morals is to educate a menace to society.
Knowing is not enough; we must apply. Willing is not enough; we must do.
The great difficulty in education is to get experience out of ideas.
No power and no treasure can outweigh the extension of our knowledge.
Seek knowledge from the cradle to the grave.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
I decided to teach because I think that any person who studies philosophy has to be involved actively.
Opinion is the medium between knowledge and ignorance.
Reading is to the mind what exercise is to the body.
The man who does not read good books has no advantage over the man who can't read them.
Books are as useful to a stupid person as a mirror is useful to a blind person.
Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.
Knowledge becomes evil if the aim be not virtuous.
There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent.
What we know is a drop, what we don't know is an ocean.
Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
When you know better you do better.
Science is a rising force, It is creating a new world about us. It needs to be watched and pressed into service, and in any case, it would be courting disaster to ignore it.
Liberty without Learning is always in peril and Learning without Liberty is always in vain.