Over on HarleyD's "Calvin on relics and such" pages I was suggesting that we are all, without grace, idolatrous, and that we can even have an idolatrous relationship with God Himself.
And to the extent that "simul iustus et peccator" accurately describes our fix between the cross and the kingdom, idolatry will ever be at least nipping at our heels.
One of my reasons for starting prayers with making the sign of the cross and murmuring "In the name of the Father and the Sone and the Holy Spirit," is that I know I can never do anything right without God's help. So it's an appeal that God will bestow his grace on my prayers and supply themn with his sanctity, since nothing I can do on my own could possibly be holy.
And similarly, I end my prayers withthe same little act as an appeal that God will continue to supply the remedy to the gaping holes and defects in my prayers and intentions.
It's important to add that I'm confident that God in His mercy answers those prayers and resolves those intentions. "His mercy endures forever."
Not if you worship Him in spirit and in truth. Not staying true to His revelation of Himself is where you would go astray.