Too much is unwholesome.

Rational free spirits are the light brigade who go on ahead and reconnoiter the ground which the heavy brigade of the orthodox will eventually occupy.

The construction of the universe is certainly very much easier to explain than is that of the plant.

It is hardly to be believed how spiritual reflections when mixed with a little physics can hold people's attention and give them a livelier idea of God than do the often ill-applied examples of his wrath.

Imagine the world so greatly magnified that particles of light look like twenty-four-pound cannon balls.

The worst thing you can possibly do is worrying and thinking about what you could have done.

He who is in love with himself has at least this advantage - he won't encounter many rivals.