That existent righteousness is to be put on. Other places of Scripture figure it as the robe of righteousness; here it is conceived of as the breastplate, but the idea of assumption is the same. It is to be put on, primarily, by faith. It is given in Christ to simple belief. He that hath faith thereby has the righteousness which is through faith in Christ, for in his faith he has the one formative principle of reliance on God, which will gradually refine character and mould conduct into whatsoever things are lovely and of good report. That righteousness which faith receives is no mere forensic treating of the unjust as just, but whilst it does bring with it pardon and oblivion from past transgressions, it makes a man in the depths of his being righteous, however slowly it may afterwards transform his conduct. The faith which is a departure from all reliance on works of righteousness which we have done, and is a single-eyed reliance on the work of Jesus Christ, opens the heart in which it is planted to all the influences of that life which was in Jesus, that from Him it may be in us. If Christ be in us (and if He is not, we are none of His), 'the spirit is life because of righteousness,' however the body may still be 'dead because of sin.' But the putting on of the breastplate requires effort as well as faith, and effort will be vigorous in the measure in which faith is vivid, but it should follow, not precede or supplant, faith. There is no more hopeless and weary advice than would be the exhortation of our text if it stood alone. It is a counsel of despair to tell a man to put on that breastplate, and to leave him in doubt where he is to find it, or whether he has to hammer it together by his own efforts before he can put it on. There is no more unprofitable expenditure of breath than the cry to men, Be good! Be good! Moral teaching without Gospel preaching is little better than a waste of breath. This injunction is continuously imperative upon all Christian soldiers. They are on the march through the enemy's country, and can never safely lay aside their armour. After all successes, and no less after all failures, we have still to arm ourselves for the fight, and it is to be remembered that the righteousness of which Paul speaks differs from common earthly moralities only as including and transcending them all. It is, alas, too true that Christian righteousness has been by Christians set forth as something fantastic and unreal, remote from ordinary life, and far too heavenly-minded to care for common virtues. Let us never forget that Jesus Himself has warned us, that except our righteousness exceed the righteousness of the Scribes and Pharisees, we shall in no wise enter the Kingdom of Heaven. The greater orbit encloses the lesser within itself.