1 Peter 5:8-9
Be sober, be vigilant; because your adversary the devil, as a roaring lion, walks about, seeking whom he may devour:…
Many a city has been taken on its strongest side, which was counted so strong that no watch was kept, even as no danger was dreaded there. We think that we are not exposed to one particular form of temptation; let none be too sure of this; and in resisting one form of evil, never let us forget that there are others in the world. Fleshly sins may be watched against, and yet room be given in the heart for spiritual wickedness, pride, self-righteousness, and the like. The victories gained over the lusts of the flesh may minister to those subtler mischiefs of the spirit: and our fate may be like that of the hero in the Maccabees, who was crushed by the falling elephant himself had slain. There is a white devil of spiritual pride as well as a black devil of fleshly lusts; and if only Satan can ruin us, it is all the same to him by what engines he does it; it is all the same to him whether we go down into hell as gross and carnal sinners, or as elated self-righteous saints. Set a watch, therefore, all round your heart; not on one side only, but on all; for you can never be sure on which side temptation will assail.
Parallel VersesKJV: Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour: