But put ye on the Lord Jesus Christ, and make not provision for the flesh, to fulfil the lusts thereof. Romans 13:14
As a man put on his garment whenever he wants to go out; the same way Christ in this place is compared to a garment that can clothe our nakedness against any fleshly lusts. It is the best robe any one can put against those fleshly desires that the enemy like to dash at God's children. The person of Christ here is simply the righteousness that He has imputed into our account and this righteousness is revealed from faith to faith. The glory of this righteousness can only be made clearer to us by faith and as it is revealed it becomes a proper dress that we put on to appear before God on a daily basis.