“Friendships acquired by a price and not by greatness and nobility of spirit are purchased but not owned, and at the proper time cannot be spent. Men are less hesitant about injuring someone who makes himself loved than one who makes himself feared, because love is held together by a chain of obligation that, since men are a wretched lot, is broken on every occasion for their own self-interest; but fear is sustained by a dread of punishment that will never abandon you.”