In the mere concept of one thing it cannot be found any character of its existence.

The greatest human quest is to know what one must do in order to become a human being.

It is not God's will merely that we should be happy, but that we should make ourselves happy

Two things fill the mind with ever-increasing wonder and awe, the more often and the more intensely the mind of thought is drawn to them: the starry heavens above me and the moral law within me... Morality is not properly the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness.

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.

Religion is too important a matter to its devotees to be a subject of ridicule. If they indulge in absurdities, they are to be pitied rather than ridiculed.

Nature even in chaos cannot proceed otherwise than regularly and according to order.