John Gill - Exposition
John Gill
And if ye do good to them which do good to you,.... As one good turn deserves another: what thank have ye? what grace or goodness is there in such an action? what glory or merit is there in it? for sinners also do even the same: wherefore no man should conclude himself a righteous man, or better than sinners, on such an account: this is to be found among the worst of men, and is natural to them,...