In mathematics you don't understand things. You just get used to them.
Opinion is the medium between knowledge and ignorance.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
The secret of life is not enjoyment but education through experience.
I don't look on poetry as closed works. I feel they're going on all the time in my head and I occasionally snip off a length.
I learned very early the difference between knowing the name of something and knowing something.
The books that the world calls immoral are books that show the world its own shame.
I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion
Dare to think for yourself.
Seek knowledge from the cradle to the grave.
I am so clever that sometimes I don't understand a single word of what I am saying.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.
Men are born ignorant, not stupid. They are made stupid by education.
The most savage controversies are those about matters as to which there is no good evidence either way.
The real solution lies in a world in which charity will have become unnecessary.
Know what you are talking about.
Reading without reflecting is like eating without digesting.
Civilization is a race between disaster and education.
Knowledge becomes evil if the aim be not virtuous.
The ability to observe without evaluating is the highest form of intelligence.