With all acknowledgment of the forty-odd years since I read the book, the strikes me as not all Lewis's. "Angst", "inner peace", "'broken system'"? I think that the credit line could do with "After" or "In the spirit of".
George you are exaclty right! I am sorry...I did see some of the not quite words but left it alone. Now that I checked the quote out it is "in the spirit of Lewis."