Consistency is the enemy of enterprise, just as symmetry is the enemy of art.

Women have been a ghastly nuisance in my life.

Youth, what a pity to waste it on the young.

The American white relegates the black to the rank of shoeshine boy; and he concludes from this that the black is good for nothing but shining shoes.

Science can never solve one problem without raising ten more problems.

Remember that I too am mortal.

Peace is not only better than war, but infinitely more arduous.