At the beginning of a marriage ask yourself whether this woman will be interesting to talk to from now until old age. Everything else in marriage is transitory: most of the time is spent in conversation.

Nothing on earth consumes a man more quickly than the passion of resentment.

How much rationality and higher protection there is in such self-deception, and how much falseness I still require in order to allow myself again and again the luxury of my sincerity.

We do not hate as long as we still attach a lesser value, but only when we attach an equal or a greater value.

The disappointed one speaks. I searched for great human beings; I always found only the apes of their ideals.

It is perhaps just dawning on five or six minds that physics, too, is only an interpretation and exegesis of the world (to suit us, if I may say so!) and not a world-explanation.

Love ever your neighbour as yourselves - but first be such as love themselves.