John Trapp on Matthew 18:28

Verse 28. And he laid hands on him, and took him, &c.] Had [illegible: 1 word] truely apprehended the pardon of his own sinnes, he would not have been so cruel to others. Had he throughly died his thoughts in the rich mercies of God, he would have shewed more mercy to men. Therefore the Apostles (when our Saviour had bidden themLuk. 17. 5. forgive, though it were oft in the same day) said unto the Lord, Increase our faith. As who should say, The more we can beleeve thy love and mercy to us, the readier shall we be to do all good offices to men. But how rigid and cruel was David to the Ammonites, while he lay in his sinne, and before he had renewed his Faith. 2 Sam. 12. 30 31.