Martin Luther and his Teachings Martin Luther was German preacher whose own spiritual crisis led to a revolution in religious thought and practice. His belief in the concept of sola fides, which means by faith alone, caused great controversy among the people of the time. He believed that in order to reach a true state of religiosity one had to believe in God's grace and blessings, that it was faith alone and not our own works that should be basis of the Christian faith. He also believed in sola scripture, which means by scripture alone. He believed that what was not in the text should n