Ask yourself always: how can this be done better?

There exists a species of transcendental ventriloquism by means of which men can be made to believe that something said on earth comes from Heaven.

The noble simplicity in the works of nature only too often originates in the noble shortsightedness of him who observes it.

We are obliged to regard many of our original minds as crazy at least until we have become as clever as they are.

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

There were honest people long before there were Christians and there are, God be praised, still honest people where there are no Christians. It could therefore easily be possible that people are Christians because true Christianity corresponds to what they would have been even if Christianity did not exist.

A good method of discovery is to imagine certain members of a system removed and then see how what is left would behave: for example, where would we be if iron were absent from the world: this is an old example.