But the Lord is faithful, who will establish you, and guard you from the evil one.
and keep you from evil: The word "evil" (poneeros) here refers to "that which is wicked: ...(R.V. appearance of evil)" (Thayer 531-1-4191). The devil is known as the evil one (Matthew 6:13; Matthew 13:19; Matthew 13:38; Ephesians 6:16).