The fourfold root of the principle of sufficent reason is "Anything perceived has a cause. All conclusions have premises. All effects have causes. All actions have motives.

We should comfort ourselves with the masterpieces of art as with exalted personages-stand quietly before them and wait till they speak to us.

Suicide may also be regarded as an experiment - a question which man puts to Nature, trying to force her to answer. The question is this: What change will death produce in a man's existence and in his insight into the nature of things? It is a clumsy experiment to make; for it involves the destruction of the very consciousness which puts the question and awaits the answer.

Wealth as well as sea water. The more we drink, the more thirsty. The so famous

It is difficult, if not impossible, to define the limit of our reasonable desires in respect of possessions.

For the world is Hell, and men are on the one hand the tormented souls and on the other the devils in it.

The assumption that animals are without rights, and the illusion that our treatment of them has no moral significance, is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality.