[S]uppose the mind of [a] friend of humanity were clouded over with his own grief, extinguishing all sympathetic participation in the fate of others; he still has the resources to be beneficent to those suffering distress, but the distress of others does not touch him because he is sufficiently busy with his own; and now, where no inclination any longer stimulates him to it, he tears himself out of his deadly insensibility and does the action without any inclination, solely from duty.

It is precisely in knowing its limits that philosophy consists.

From such crooked wood as that which man is made of, nothing straight can be fashioned.

Law And Freedom without Violence (Anarchy) Law And Violence without Freedom (Despotism) Violence without Freedom And Law (Barbarism) Violence with Freedom And Law (Republic)

Philosophy stands in need of a science which shall determine the possibility, principles, and extent of human knowledge à priori.

What are the aims which are at the same time duties? They are perfecting of ourselves, the happiness of others.

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