The strongest is never strong enough to be always the master, unless he transforms strength into right, and obedience into duty.
Jean-Jacques RousseauGratitude is a duty which ought to be paid, but which none have a right to expect.
Jean-Jacques RousseauLeave those vain moralists, my friend, and return to the depth of your soul: that is where you will always rediscover the source of the sacred fire which so often inflamed us with love of the sublime virtues; that is where you will see the eternal image of true beauty, the contemplation of which inspires us with a holy enthusiasm.
Jean-Jacques Rousseau