Jean François Paul de Gondi de Retz, Memoirs of Jean François Paul de Gondi…
“ For he was so conscious of his reasons, that I could even swear he would have protested from the very bottom of his heart that he had no other motive than the apprehension of the dangers to which a contrary profession might expose my soul. So true it is that nothing is so subject to delusion as piety: all sorts of errors creep in and hide themselves under that veil; it gives a sanction to all the turns of imagination, and the honesty of the intention is not sufficient to guard against it. ”
