I do not believe that I am now dreaming, but I cannot prove that I am not.

I am myself a dissenter from all known religions, and I hope that every kind of religious belief will die out.

Always remember that true happiness is not in getting what you want, but wanting what you already have. He who dies with the most toys is still dead. What is wanted is not the will to believe, but the will to find out, which is the exact opposite.

The true function of logic ... as applied to matters of experience ... is analytic rather than constructive; taken a priori, it shows the possibility of hitherto unsuspected alternatives more often than the impossibility of alternatives which seemed prima facie possible. Thus, while it liberates imagination as to what the world may be, it refuses to legislate as to what the world is

What hunger is in relation to food, zest is in relation to life.

Science is what you know, philosophy is what you don't know.

Boys and girls should be taught respect for each other's liberty... and that jealousy and possessiveness kill love.