So he tells us that if we don't forgive one another, he will not forgive us.

And as we all want to be forgiven, we had better mind what we're told.

If you don't forgive this boy, who has done you a great wrong, but is sorry for it, God will not forgive you--and that's a serious affair." "He's never begged my pardon yet," said the old woman, whose dignity required the utter humiliation of the offender.
"I beg your pardon, Mrs.Gregson," I said.

"I shall never be rude to you again." "Very well," she answered, a little mollified at last.
"Keep your promise, and we'll say no more about it.

It's for your father's sake, mind, that I forgive you." I saw a smile trembling about my father's lips, but he suppressed it, saying, "Won't you shake hands with him, Mrs.Gregson ?" She held out a poor shrivelled hand, which I took very gladly; but it felt so strange in mine that I was frightened at it: it was like something half dead.