"For just as the first general precepts of the law of nature are self-evident to one in possession of natural reason, and have no need of promulgation, so also that of believing in God is primary and self-evident to one who has faith: for he that cometh to God must believe that he is."

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A fiery shield is God's Word; of more substance and purer than gold, which, tried in the fire, loses nought of its substance, but resists and overcomes all the fury of the fiery heat; even so, he that believes God's Word overcomes all, and remains secure everlastingly, against all misfortunes; for this shield fears nothing, neither hell nor the devil.

— Martin Luther