When someone wrongs you, ask yourself what they thought was good or bad when they did it. Once you know this, you will pity them. You will not wonder or get angry. Either you still live with the same mistake they do — thinking the same thing is good, or something like it — and then you must forgive them since you would do the same thing. Or you no longer think those things are good or bad like they do. Then how can you not be gentle with someone who is confused?
Whensoever any man doth trespass against other, presently consider with thyself what it was that he did suppose to be good, what to be evil, when he did trespass. For this when thou knowest, thou wilt pity him thou wilt have no occasion either to wonder, or to be angry. For either thou thyself dust yet live in that error and ignorance, as that thou dust suppose either that very thing that he doth, or some other like worldly thing, to be good; and so thou art bound to pardon him if he have done that which thou in the like case wouldst have done thyself. Or if so be that thou dost not any more suppose the same things to be good or evil, that he doth; how canst thou but be gentle unto him that is in an error?