" As Claude Frollo had passed through nearly the entire circle of human learning—positive, exterior, and permissible—since his youth, he was obliged, unless he came to a halt, ubi defuit orbis, to proceed further and seek other aliments for the insatiable activity of his intelligence. The antique symbol of the serpent biting its tail is, above all, applicable to science. "

― Victor Hugo , Complete Works of Victor Hugo