Of course I know that the Enemy also wants to detach men from themselves, but in a different way. Remember always, that He really likes the little vermin, and sets an absurd value on the distinctness of every one of them. When He talks of their losing their selves, He only means abandoning the clamour of self-will; once they have done that, He really gives them back all their personality, and boasts (I am afraid, sincerely) that when they are wholly His they will be more themselves than ever. Hence, while He is delighted to see them sacrificing even their innocent wills to His, He hates to see them drifting away from their own nature for any other reason. And we should always encourage them to do so.
From The Screwtape Letters by C S Lewis
[Note: for those unfamiliar with The Screwtape Letters, they're written by a senior devil to a junior one, giving advice on how to tempt and destroy human beings. The 'Enemy' in this case is God himself.]