Martin Luther believed that the path to salvation comes solely through
the Grace of God through faith in Jesus Christ, rather than by specific
actions we take during our lifetimes. This view came specifically in
opposition to certain practices of the Catholic Church, to which Luther
objected.
Martin Luther believed that the path to salvation was not by buying indulgences but rather that the Bible is the source of all religious authority and that salvation would come from faith and not deeds.
