THERE ARE TWO THINGS that don't have to mean anything, one is music and the other is laughter.

The only objects of practical reason are therefore those of good and evil. For by the former is meant an object necessarily desired according to a principle of reason; by the latter one necessarily shunned, also according to a principle of reason.

The busier we are, the more acutely we feel that we live, the more conscious we are of life.

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.

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.

Men will not understand ... that when they fulfil their duties to men, they fulfil thereby God's commandments; that they are consequently always in the service of God, as long as their actions are moral, and that it is absolutely impossible to serve God otherwise.

Man's greatest concern is to know how he shall properly fill his place in the universe and correctly understand what he must be in order to be a man.