, that one can find gratification also in the mere application of strength, in the consciousness of one's fortitude of soul in overcoming obstacles opposing one's project, in the cultivation of spiritu talents, etc.; and we rightly call these the more refined joys and delights, because they are more under our contr than others, do not wear out, but rather fortify our feeling for still further enjoyment of them, and in delighting us they at the same time cultivate us.