The function of the true state is to impose the minimum restrictions and safeguard the maximum liberties of the people, and it never regards the person as a thing.

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.

It is difficult for the isolated individual to work himself out of the immaturity which has become almost natural for him.

In every department of physical science there is only so much science, properly so-called, as there is mathematics.

Out of the crooked timber of humanity, no straight thing was ever made.

Humanity is at its greatest perfection in the race of the whites.

The only thing permanent is change.