In this new state of things, the simplicity and solitariness of man's life, the limitedness of his wants, and the instruments which he had invented to satisfy them, leaving him a great deal of leisure, he employed it to supply himself with several conveniences unknown to his ancestors; and this was the first yoke he inadvertently imposed upon himself, and the first source of mischief which he prepared for his children; for besides continuing in this manner to soften both body and mind, these conveniences having through use lost almost all their aptness to please, and even degenerated into real wants, the privation of them became far more intolerable than the possession of them had been agreeable; to lose them was a misfortune, to possess them no happiness.