"Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness" (Eph. 6:14).
This part of the armour of a Roman soldier was generally made of a piece of iron or brass, and which particularly covered and protected the vital parts, such as the heart, lungs, and liver. A very important thing, then, was the “breast plate,” or piece of iron or brass, covering, as it did, the vital parts of the Roman soldier. Now, we have to ask ourselves, in connection with this, What is this? What have we for a breast-plate to protect us?
One or another says, we must live a righteous life. True, we have to seek to live a righteous life; but this is not the point here. It is this, that we seek continually, as poor weak sinners, to hide ourselves in the righteousness of the Lord Jesus Christ.
In this spiritual conflict there is nothing so important, as that from the very beginning of the spiritual course, we begin as poor miserable sinners, trusting alone in the righteousness of Christ,—the righteousness which the Blessed One has wrought out for sinners, the righteousness in which alone we trust before God. This the only ground on which we expect God to help us, to answer our prayers, and deliver us from the difficulties with which we meet in our spiritual conflict.