"They err who call on the Saints that are placed beyond this life.
1. Because Scripture teaches that prayer ought to be offered to God alone, who alone knows what is necessary for us. He chooses to be present, because he has promised. He can do so, for he is Almighty.
2. Because he requires that he be addressed in faith, which rests on his word and promise.
3. Because faith is corrupted as soon as it departs from this rule. But in calling on the saints there is no word, no promise; and therefore there is no faith; nor can the saints themselves either hear or assist."
—John Calvin