That old snake will take a form ithat iss pleasing to the eye, and by the time he's done you just want to die. Lucifer will paint a beautiful picture of hopelessness leaving you wondering why you even want to carry on, causing you to lose your faith, and confidence in yourself.
He will call into question your faith, and you are walk with the Lord. Which is funny since he hates both you and the Lord, and the walk might be taking. The last thing he'd ever want is for you to be walking the path of the Lord. So he constantly throws shadows of doubt on the road which you are taking, which in turn cause you to doubt if you are on the right road, and doing the right thing for the Lord, or whether you are worthy enough to do the Lord's work.
As you battle the doubt demons always keep in mind that the Lord is by your side. You may stumble, fall, or even wander off the road into the woods, but the Lord is always there to help. Do not lose sight of that fact, and never hesitate to say,"Satan get behind me."