"All worlds," he added, "are not actually inhabited. Some are at the dawn, others at twilight. For example, in our solar system, Mars, Venus, Saturn, and several of his satellites seem to be in full vital activity. Jupiter appears not to have passed its primary period; the Moon has perhaps no longer any inhabitants. Our own period is of no more importance in the general history of the universe than one anthill in the infinite. Before the existence of the earth, there had been, from all eternity, worlds peopled with humanities. When our planet shall have ceased to live, and the last human family shall have fallen asleep on the brink of the last lagoon of the frozen ocean, numberless suns will still shine in the infinite, there will still be mornings and evenings, spring-time and flowers, hopes and joys, other suns, other earths, other humanities,--boundless space, peopled with tombs and cradles. But life, thought, eternal progress, are the final object of creation. "The earth is a star's satellite. Now, as well as in the future, we are citizens of the sky; whether we know it or not, we are really living in the stars." Thus the two friends conversed about the deep subjects which engrossed their thoughts; when they were conquering a problem, even if it were incomplete, they experienced a true happiness at having taken another step in their search for the unknown, and could then talk more quietly about the ordinary things of life. They were two minds equally eager for knowledge, imagining in their youthful fervor that they could isolate themselves from the world, look down upon human ideas, and in their celestial flight reach the star of Truth, which shone above their heads in the depths of the infinite. [Illustration] [Illustration] IV. AMOR.