If out of all mankind one finds a single friend, he has found something more precious than any treasure, since there is nothing in the world so valuable that it can be compared to a real friend.

Love is always a stranger in the house of avarice.

Even if the whole earth and sea were turned to gold, they could hardly satisfy the avarice of a woman... You can more easily scratch a diamond with your fingernail than you can by any human ingenuity get a woman to consent to giving any of her savings.

May you be of service to mankind.

And mankind is naught but a single nation

There is no work of genius which has not been the delight of mankind, no word of genius to which the human heart and soul have not sooner or later responded