I haven't read the book, but the story of Adam & Eve shows how clever
the adversary can really be.For example, in Genesis 3, while Satan
was tempting Eve, he said, "Ye shall not surely die [... but ...] ye shall
be as gods, knowing good and evil." This is one of the tactics
he uses to deceive -- he mixes a truth with a lie so it is not as easy to
recognize the error or falsehood. Later in Genesis 3, God said
"[..] Behold, the man is become as one of us, to know good and evil."In short, this confirms Satan was right about Adam & Eve able to
become like God, knowing good and evil. But he mixed this truth with the lie of
them not being able to die (physically and spiritually)!
I've often wondered if "Satan" is like Mr.Slugworth in Willy Wonka
and the Chocolate Factory.You know - secretly works for the Big guy
by tempting the children and testing their integrity.