It is always wise to avoid every possibility of causing enmity, and to make every effort to turn any enemy, even a person in the least degree offended, even a person who has slightly misunderstood you, or perhaps has felt vexed with you, into a friend again; nor for the sake of your own happiness or even of his, but for the sake of the good principle, for material benefit. For however slight an enemy he may be, he can cause you very great pain or suffering, and however little friendship you have with a person, he may become most useful some day. And apart from all material benefits, to feel, "That person is pleased with me, he is well-disposed towards me, he is no longer my enemy", is in itself such a great benefit.