From The Shepherd of Hermes:

3:2 But the great mercy of the Lord had pity on thee and thy family, and will strengthen thee, and establish thee in His glory. Only be not thou careless, but take courage, and strengthen thy family. For as the smith hammering his work conquers the task which he wills, so also doth righteous discourse repeated daily conquer all evil. Cease not therefore to reprove thy children; for I know that if they shall repent with all their heart, they shall be written in the books of life with the saints.”