Heart Murder

From Studies on the Sermon on the Mount, considering Matt. 5:21-22

“What is the state of your heart? How do you react to things that happen? Do you find yourself flaring into a raging temper when a person has done something to you? Or do you sometimes feel anger against a person who really has done nothing to you at all? These are the things that matter. It is that which God meant when He said, ‘Thou shalt not kill’. ‘God seeth the heart’ and is not concerned only with the external action. God forbid that we should produce a kind of self-righteousness by reducing the law of God to something which we know we have already kept, or which we feel sure we are not likely to transgress, ‘let every man examine himself’.
–M. D. Llyod-Jones