After each creative act one has to be sustained by one's strength of character, by a moral sense, by I don't know what, lest one tumble.

I would . . . be so exhausted by my determination that I had no strength left to do the actual work.

I think what weakens people most is fear of wasting their strength.

Ultimately, we have just one moral duty: to reclaim large areas of peace in ourselves, more and more peace, and to reflect it towards others. And the more peace there is in us, the more peace there will be in our troubled world.

We have to fight them daily, like fleas, those many small worries about the morrow, for they sap our energies.

We are always in search of the redeeming formula, the crystallizing thought.