Jesus warns His disciples that temptations and stumbling blocks are unavoidable and that severe judgment awaits those who ensnare others, then commands that we take heed to ourselves, rebuke a sinning brother, and freely forgive the one who repents. When the disciples plead, "Lord, increase our faith," Jesus teaches that even mustard-seed faith accomplishes great things, and that obedience such as forgiveness is simply the servant's duty.