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.
The breastplate of righteousness is our defence against evil. The opposition to temptation is best carried on by the positive cultivation of good. A habit of righteous conduct is itself a defence against temptation. Untilled fields bear abundant weeds. The used tool does not rust, nor the running water gather scum. The robe of righteousness will guard the heart as effectually as a coat of mail. The positive employment with good weakens temptation, and arms us against evil. But so long as we are here our righteousness must be militant, and we must be content to live ever armed to meet the enemy which is always hanging round us, and watching for an opportunity to strike. The time will come when we shall put off the breastplate and put on the fine linen 'clean and white,' which is the heavenly and final form of the righteousness of Saints.