A man without a goal is like a ship without a rudder.
This world, after all our science and sciences, is still a miracle wonderful, inscrutable, magical and more, to whosoever will think of it.
Adversity is the diamond dust Heaven polishes its jewels with.
Man is, properly speaking, based upon hope, he has no other possession but hope; this world of his is emphatically the place of hope.
The only means of strengthening one’s intellect is to make up one’s mind about nothing, to let the mind be a thoroughfare for all thoughts.
Imagination is a poor matter when it has to part company with understanding.
Laughter is one of the very privileges of reason, being confined to the human species.
You speak of Lord Byron and me; there is this great difference between us. He describes what he sees I describe what I imagine. Mine is the hardest task.
The poetry of the earth is never dead.
Science must have originated in the feeling that something was wrong.