To obtain an assured favorable response from people, it is better to offer them something for their stomachs instead of their brains.

If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place.

But their intervention makes our acts to serve ever less merely the immediate claims of our instincts.

The bitter and the sweet come from the outside, the hard from within, from one's own efforts.

To obtain an assured favorable response from people, it is better to offer them something for their stomachs instead of their brains.

It gives me great pleasure indeed to see the stubbornness of an incorrigible nonconformist warmly acclaimed.

When the Special Theory of Relativity began to germinate in me, I was visited by all sorts of nervous conflicts... I used to go away for weeks in a state of confusion.