Andreas Capellanus — French Writer

Andreas Capellanus (Capellanus meaning "chaplain"), also known as Andrew the Chaplain, and occasionally by a French translation of his name, André le Chapelain, was the 12th-century author of a treatise commonly known as De amore ("About Love"), and often known in English, somewhat misleadingly, as The Art of Courtly Love, though its realistic, somewhat cynical tone suggests that it is in some measure an antidote to courtly love. Little is known of Andreas Capellanus's life, but he is presumed to have been a courtier of Marie de Champagne, and probably of French origin... (wikipedia)

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.