Don't listen to their words, fix your attention on their deeds.
If I am right the Germans will say I was a German, and the French will say I was a Jew; If I am wrong the Germans will say I was a Jew and the French will say I was a German.
A mathematical equation stands forever.
Regarding sex education: no secrets!
I have just got a new theory of eternity.
To know what is impenetrable to us really exists, manifesting itself as the highest wisdom and the most radiant beauty... this knowledge, this feeling is at the center of true religiousness.