I just read his long booklet. There was a lot in it that I agreed with but...it's as if he first argues against self will but then argues for it, then against it again.But the only really bad part I found in the booklet was the idea that we should never be sick. Job directly opposes this. God permitted afflictions, and by satans hand no less, FOR the eternal good of Job and FOR his growth. If you claim we should never be sick, you MUST answer the problem of Job. And Job gives great comfort to me. I agree that God does not cause one of His children to be sick. BUT, He DOES permit satan himself to bring things to us, hard things, that grow our faith. God doesn't just allow it. He doesn't just allow satan to buffet us because, oh well, satan is in charge. As astounding as it sounds, God uses satan...for our good. Satans goal is not our good but Gods' goal is our good, so He somehow turns it to good, to grow our faith, confound our presumptuousness, and so much more.
It seems it should cause us fear that God sometimes permits satan to buffet us, but it should bring relief, actually, because in the two instances of it I have found, satan has to have Gods' permission first, as with Job, and also with peter (satan has asked permission to sift you like wheat.) But what happens when wheat is sifted? All that isn't true wheat falls out and what remains is purer than it was before. Now if you don't want to be purer than before but only want to never die, that is another problem and another discussion.