Procrastination is hardly more evil than grasping impatience.

Beneficence is a duty. He who frequently practices it, and sees his benevolent intentions realized, at length comes really to love him to whom he has done good. When, therefore, it is said, "Thou shalt love thy neighbor as thyself," it is not meant, thou shalt love him first and do him good in consequence of that love, but, thou shalt do good to thy neighbor; and this thy beneficence will engender in thee that love to mankind which is the fulness and consummation of the inclination to do good.

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

The sceptics, a kind of nomads, despising all settled culture of the land, broke up from time to time all civil society. Fortunately their number was small, and they could not prevent the old settlers from returning to cultivate the ground afresh, though without any fixed plan or agreement.

An organized product of nature is that in which all the parts are mutually ends and means.

Enlightenment is man's emergence from his self-incurred immaturity.

Act so as to use humanity, yourself and others, always as an end and never as a means to an end.