John Dewey

Just as a flower which seems beautiful and has color but no perfume, so are the fruitless words of the man who speaks them but does them not.

Anyone who has begun to think, places some portion of the world in jeopardy.

Skepticism: the mark and even the pose of the educated mind.

Luck, bad if not good, will always be with us. But it has a way of favoring the intelligent and showing its back to the stupid.

Man is not logical and his intellectual history is a record of mental reserves and compromises. He hangs on to what he can in his old beliefs even when he is compelled to surrender their logical basis.

We only think when we are confronted with problems.