Love is the magician, the enchanter, that changes worthless things to joy, and makes right royal kings and queens of common clay. It is the perfume of that wondrous flower, the heart, and without that sacred passion, that divine swoon, we are less than beasts; but with it, earth is heaven, and we are gods.

Robert Green Ingersoll (1833–1899) American lawyer, freethinker, orator

Lecture (1884-01-20), “Orthodoxy,” Tabor Opera House, Denver, Colorado
    (Source)

Published as its own book in 1884, though this passage is not in it.