My Dear Sleeblurk,
After reading your last letter (twice, to make certain that I had not read it incorrectly), I concluded that you are mad.
You say that after much inquiring in the Research Department, you made a "delightful discovery," that the damaging instruments I mentioned in my last letter were highly addictive and, thusly, deeply corrupting (which makes me wonder: just what is old Slubglob teaching at the Training College?) You then go on to say that, if you manage to get your patient addicted to one or more of these damaging instruments, he will go into an inescapable downward spiral leading straight into Our Father's House.
First, let me say that, yes, your "delightful discovery" is correct; those damaging instruments are, indeed, highly addictive. However, your certainty of the success of your thesis is foolishness. In reality, it is a hit-or-miss strategy. I cannot tell you how many patients we've lost to the Enemy by using this method.
The patient, after getting addicted to these instruments, will go into a downward spiral, from which he cannot recover on his own. However, the Enemy, sly as he is, will not allow that. He will send one of his agents to witness to the patient. In his weakened state, the patient will see the misleading garbage fed to him by the Enemy's agent as wonderful news and his escape rope from his hole. He will undoubtedly convert and become one of the most assured agents of the Enemy. What's worse, he may even testify to other humans, turning them all from the path to Our Father's House forever! As your great-uncle and senior, I strongly advise you not to risk it.
A more sure strategy is to gradually corrupt the patient. Allow him to go to the party, allow him to give in to the many delightful temptations he will find there, and allow him to partake of the damaging instruments in moderation. If he is helplessly addicted so soon, it will not allow time for other forms of corruption, leading him down a path that could be fatal for us. He must be well rounded. After a decade or so of such corruption, he will be too used to it (and, more importantly, he will find it a lifestyle he enjoys much more than the lifestyle encouraged by agents of the Enemy) to turn back. Subtleness is important; your patient must not realize he's damned until it's too late,
Your Affectionate Great-Uncle,
Screwtape