The sceptics, a kind of nomads, despising all settled culture of the land, broke up from time to time all civil society. Fortunately their number was small, and they could not prevent the old settlers from returning to cultivate the ground afresh, though without any fixed plan or agreement.

We find that the more a cultivated reason devotes itself to the aim of enjoying life and happiness, the further does man get away from true contentment.

All perception is colored by emotion.

We are not rich by what we possess but by what we can do without.

The more we come in contact with animals and observe their behaviour, the more we love them, for we see how great is their care of the young.

Act only according to that maxim whereby you can at the same time will that it should become a universal law.

But although all our knowledge begins with experience, it does not follow that it arises from experience.