C. Matthew McMahon, Taking the Name of God in Vain (Prendre le nom de Dieu en vain)
But the [improper] use of God's name is hardly restricted just to language... Whenever we do not live up to the call of the Christian life, we take God's name in vain. We are mirrors that should reflect the perfection of God. If the mirror claims to be Christ's and reflects tendencies of hell, then we use the name of Christ in vain, and people see that.
C. Matthew McMahon, Taking the Name of God in Vain