Mediator Dei §13

¹³ It is unquestionably the fundamental duty of man to orientate his person and his life towards God. "For He it is to whom we must first be bound, as to an unfailing principle; to whom even our free choice must be directed as to an ultimate objective. It is He, too, whom we lose when carelessly we sin. It is He whom we must recover by our faith and trust." But man turns properly to God when he acknowledges His Supreme majesty and supreme authority; when he accepts divinely revealed truths with a submissive mind; when he scrupulously obeys divine law, centering in God his every act and aspiration; when he accords, in short, due worship to the One True God by practicing the virtue of religion.