Shepherd of Hermas

"Fear the Lord," saith he, "and keep His commandments. So keeping the commandments of God thou shalt be powerful in every deed, and thy doing shall be incomparable. For whilst thou fearest the Lord, thou shalt do all things well. But this is the fear wherewith thou oughtest to be afraid, and thou shalt be saved.

But fear not the devil; for, if thou fear the Lord, thou shalt be master over the devil, for there is no power in him. [For] in whom is no power, neither is there fear of him; but in whom power is glorious, of him is fear likewise. For every one that hath power hath fear, whereas he that hath no power is despised of all.