Opinion is the medium between knowledge and ignorance.
I decided to teach because I think that any person who studies philosophy has to be involved actively.
It isn't what we don't know that gives us trouble, it's what we know that ain't so.
Language is courage: the ability to conceive a thought, to speak it, and by doing so to make it true.
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.
You can never be overdressed or overeducated.
They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance.
Many much-learned men have no intelligence.
Common sense is the collection of prejudices acquired by age eighteen.
No power and no treasure can outweigh the extension of our knowledge.
Dare to think for yourself.
What we know is a drop, what we don't know is an ocean.
I had rather excel others in the knowledge of what is excellent, than in the extent of my power and dominion
Education is the best friend. An educated person is respected everywhere. Education beats the beauty and the youth.
I am indebted to my father for living, but to my teacher for living well.
Study hard what interests you the most in the most undisciplined, irreverent and original manner possible.
All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.
All stable processes we shall predict. All unstable processes we shall control.
Learning never exhausts the mind.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
If one cannot enjoy reading a book over and over again, there is no use in reading it at all.