“You should venerate not only the icon of Christ, but also the similitude of His cross. For the cross is Christ’s great sign and trophy of victory over the devil and all his hostile hosts; for this reason they tremble and flee when they see the figuration of the cross. This figure, even prior to the crucifixion, was greatly glorified by the prophets and wrought great wonders; and when He who was hung upon it, our Lord Jesus Christ, comes again to judge the living and the dead, this His great and terrible sign will precede Him, full of power and glory (cf. Matt. 24:30).
So glorify the cross now, so that you may boldly look upon it then and be glorified with it. And you should venerate icons of the saints, for the saints have been crucified with the Lord; and you should make the sign of the cross upon your person before doing so, bringing to mind their communion in the sufferings of Christ.”