I have read all of Tozers books. I love having the set to do quick searches in.I think he says it best. "The worst thing a book can do for a Christian is to leave him with the impression that he has received from it anything really good; the best it can do is to point the way to the Good he is seeking. The function of a good book is to stand like a signpost directing the reader toward the Truth and the Life. That book serves best which early makes itself unnecessary, just as a signpost serves best after it is forgotten, after the traveler has arrived safely at his desired haven. The work of a good book is to incite the reader to moral action, to turn his eyes toward God and urge him forward. Beyond that it cannot go." Tozer, A. W. (2007). God’s pursuit of man (p. xv). Camp Hill, PA: WingSprea