Michel de Montaigne Quote
A true prayer and religious reconciling of ourselves to Almighty God cannot enter into an impure soul, subject at the very time to the dominion of Satan. He who calls God to his assistance whilst in a course of vice, does as if a cut-purse should call a magistrate to help him, or like those who introduce the name of God to the attestation of a lie.
Book I, ch. 56. Of Prayers - Essais (1595)
