"And although I have seen nothing but black crows in my life, it doesn't mean that there's no such thing as a white crow. Both for a philosopher and for a scientist it can be important not to reject the possibility of finding a white crow. You might almost say that hunting for 'the white crow' is science's principal task."
"Man is the measure of all things', said the Sophist Protagora (c. 485-410 B.C.). By that he meant that the question of whether a thing is right or wrong, good or bad, must always be considered in relation to a person's needs."
"A true philosopher must never give up."
"When we sense something, it is due to the movement of atoms in space. When I see the moon it is because "moon atoms"penetrate my eye."
"Wisest is she who knows she does not know."
"Life is both sad and solemn. We are led into a wonderful world, we meet one another here, greet each other - and wander together for a brief moment. Then we lose each other and disappear as suddenly and unreasonably as we arrived."