I thought I remember reading somewhere that Pope St. Zosimus also condemned the same kind of heresy during the time of the Pelagian heresy, but I had not been able to find the quote. It used to be on the older version of the website of catholicism.org several years ago. Perhaps it was the above quote of Pope Pius II instead that I may have read years ago. Not to veer off topic, but I saved a wine bottle that actually has a painting with Pius II presenting a bride and groom to each other.