The most baleful mischiefs may be expected from the unmanly conduct of not daring to face truth because it is unpleasing.

No limits whatever are placed to the productions of the earth; they may increase forever.

Man cannot live in the midst of plenty.

It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment.

The finest minds seem to be formed rather by efforts at original thinking, by endeavours to form new combinations, and to discover new truths, than by passively receiving the impressions of other men's ideas.

A writer may tell me that he thinks man will ultimately become an ostrich. I cannot properly contradict him.

Instead of recommending cleanliness to the poor, we should encourage contrary habits. In our towns we should make the streets narrower, crowd more people into the houses, and court the return of the plague.