context: In the summer of 1521, Luther widened his target from individual pieties like indulgences and pilgrimages to doctrines at the heart of Church practices. In On the Abrogation of the Private Mass, he condemned as idolatry the idea that the mass is a sacrifice, asserting instead that it is a gift, to be received with thanksgiving by the whole congregation. His essay On Confession, Whether the Pope has the Power to Require It rejected compulsory confession and encouraged private confession and absolution, since "every Christian is a confessor." In November, Luther wrote The Judgement of Martin Luther on Monastic Vows. He assured monks and nuns that they could break their vows without sin, because vows were an illegitimate and vain attempt to win salvation.
question: లూథర్ ప్రధాన చర్చి సిద్ధాంతాలను చేర్చడానికి తన దాడులను ఎప్పుడు విస్తృతం చేశాడు?
answers: summer of 1521 summer of 1521 1521