In the Screwtape Letters, Wormwood recommends to Screwtape that he practice appearing as an angel of light in order to tempt his "patient" easier.
And no, animedude, that is no way off topic. It's an excellent analogy.
Remember, as it says in The Screwtape Letters:
The safest road to Hell is the gradual one — the gentle slope, soft underfoot, without sudden turnings, without milestones, without signposts.