Out of Nature's mystery, somehow or other, this strange magic suddenly illuminates the senses of a man; then vanishes again, as noiselessly as it came.

It is a very ghostly thing, and can not be explained by any theory not of a very ghostly kind.

Even Herbert Spencer has devoted his reasoning to a new theory about it.

I need not go further in this particular than to tell you that in a certain way passion is now thought to have something to do with other lives than the present; in short, it is a kind of organic memory of relations that existed in thousands and tens of thousands of former states of being.

Right or wrong though the theories may be, this mysterious moment of love, the period of this illusion, is properly the subject of high poetry, simply because it is the most beautiful and the most wonderful experience of a human life.