One of the Devil's favourite tools is DISCOURAGEMENT! Always trying to get you looking at your own mistakes, sins, weaknesses and failures!
Just picks and picks at all your little flaws and shortcomings and exaggerates and blows them up out of all proportion! This is one of the Devil's favourite tactics. Knowing that it's impossible for a failing local body (who bank roles them) to defeat you as long as you keep on fighting, so she tries to persuade you that you're a hopeless case, so you might as well surrender and give up.