LEV639 It is a negative commandment to harbor no hatred in our heart toward our fellow-man as Scripture says, nor shall you bear any grudge [this verse]. Bearing a grudge means that one harbors hate in his heart: for instance, if he tells him, "Here I am lending it to you; I am not paying you back as you acted toward me, refusing to lend me something." This is bearing a grudge, where he nurses hate in his heart. Instead, he has to lend it to him wholeheartedly; there should be no ill will whatever in his heart, but he should rather erase the matter from his heart, and not retain it or remember it at all. These two qualities are extremely bad. For all the matters and concerns of this world are vapid nonsense and triviality, and it is not worth taking revenge or bearing a grudge about them.