Man knows that there is such a thing as love, but he does not know what love is. He knows that there is such a thing as love from common speech, as when it is said, he loves me, a king loves his subjects, and subjects love their king, a husband loves his wife, a mother her children, and conversely ; also, this or that one loves his country, his fellow-citizens, his neighbor ; and likewise of things abstracted from person, as when it is said, one loves this or that thing. But although the word love is so universally used, hardly anybody knows what love is. And because one is unable, when he reflects upon it, to form to himself any idea of thought about it, he says either that it is not anything, or that it is merely something flowing in from sight, hearing, touch, or intercourse with others.
