Matthew 18 is about the Gospel story. We have sinned and we often think we are the greatest. God came to us as He came to Israel, showing them their fault, with the Law and the Prophets. He sent many prophets, one after another, many witnesses against our sin, but we refused to hear them. But instead of taking that last step and treating us as heathens, He put on tender mercies. He sent His son to us. Now, we should have been thrown in the sea with a heavy rock tied to us, but Jesus jumped in, instead. He is bearing with us and forgiving us. We owed His Father a huge debt, and if we come and beg for mercy, He will give mercy. He releases the whole debt.