My main page on quotes is Quotes to Make You Think. Additional ones can be found under the Quotes tag.

I am certain there is too much certainty in the world. — Michael Crichton

The men who cannot laugh at themselves frighten me even more than those who laugh at everything. — Anne Perry

It always seems impossible until it’s done. — Nelson Mandela

Anyone can be a barbarian; it requires a terrible effort to remain a civilized man. — Leonard Woolf

Everyone you will ever meet knows something you don’t. — Bill Nye

Two is company, four is a party, three is a crowd. One is a wanderer. — James Thurber