"Peter had come to Christ with the question, "How oft shall my 
brother sin against me, and I forgive him? till seven times?"
--The rabbis limited the exercise of forgiveness to three offenses.
--Peter, carrying out, as he supposed, the teaching of Christ, thought to extend it to seven, the number signifying perfection.
--But Christ taught that we are never to become weary of forgiving. Not "Until seven times," He said, "but, Until seventy times seven."
E.G.W/Matt.18:21-35