The true is the name of whatever proves itself to be good in the way of belief, and good, too, for definite, assignable reasons.

The art of being wise is the art of knowing what to overlook.

Act as if what you do makes a difference. It does.

The greatest discovery of my generation is that a human being can alter his life by altering his attitudes of mind.

Be not afraid of life. Believe that life is worth living, and your belief will help create the fact.

The seeker after truth is not one who studies the writings of the ancients and, following his natural disposition, puts his trust in them, but rather the one who suspects his faith in them and questions what he gathers from them.

-- Ibn al-Haytham

The duty of the man who investigates the writings of scientists, if learning the truth is his goal, is to make himself an enemy of all that he reads.

-- Ibn al-Haytham

Fables should be taught as fables, myths as myths, and miracles as poetic fancies.

-- Hypatia

To teach superstitions as truth is a most terrible thing.

-- Hypatia

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

-- Bertrand Russell

I would rather have questions that can't be answered than answers that can't be questioned.

-- Richard Feynman