Page:Psychology of the Unconscious (1916).djvu/196

138 *sinti = to praise.[29] It can be said that the conception of libido as developed in the new work of Freud and of his school has functionally the same significance in the biological territory as has the conception of energy since the time of Robert Mayer in the physical realm.[30] It may not be superfluous to say something more at this point concerning the conception of libido after we have followed the formation of its symbol to its highest expression in the human form of the religious hero.