Moreover, faith is twofold. For faith cometh by hearing. Rom. x. 17. For by hearing the divine Scriptures we believe in the teaching of the Holy Spirit. The same is perfected by all the things enjoined by Christ, believing in work, cultivating piety, and doing the commands of Him Who restored us. For he that believeth not according to the tradition of the Catholic Church, or who hath intercourse with the devil through strange works, is an unbeliever.