In the part of this universe that we know there is great injustice, and often the good suffer, and often the wicked prosper, and one hardly knows which of those is the more annoying.

The good life is one inspired by love and guided by knowledge.

All exact science is dominated by the idea of approximation.

In our complex world, there cannot be fruitful initiative without government, but unfortunately there can be government without initiative.

The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things, or, if it is night, about nothing at all.

In America everybody is of the opinion that he has no social superiors, since all men are equal, but he does not admit that he has no social inferiors, for, from the time of Jefferson onward, the doctrine that all men are equal applies only upwards, not downwards.

Not to be absolutely certain is, I think, one of the essential things in rationality.