Once we accept our limits, we go beyond them.

Keep on sowing your seed, for you never know which will grow - perhaps it all will.

You imagine that I look back on my life's work with calm satisfaction. But from nearby it looks quite different. There is not a single concept of which I am convinced that it will stand firm, and I feel uncertain whether I am in general on the right track.

I am not an atheist. I do not know if I can define myself as a pantheist. The problem involved is too vast for our limited minds.

If this being is omnipotent, then every occurrence, including every human action, every human thought, and every human feeling and aspiration is also His work; how is it possible to think of holding men responsible for their deeds and thoughts before such an almighty Being? In giving out punishment and rewards He would to a certain extent be passing judgment on Himself. How can this be combined with the goodness and righteousness ascribed to Him?

It is every man's obligation to put back into the world at least the equivalent of what he takes out of it.

Thanks to my fortunate idea of introducing the relativity principle into physics, you (and others) now enormously overrate my scientific abilities, to the point where this makes me quite uncomfortable.