Where does this Augustine quote come from? "Sin is believing the lie that you are self-created, self-dependent and self-sustained" -Augustine

Which work is this from?
Based on a google book search, I believe this quote comes from:


Title: Masterpieces of World Philosophy in Summary Form, Volume 1
Editor: Frank Northen Magill
Publisher: Salem Press, 1961


It appears to be available on Amazon, and I also found a very poor transcription on archive.org. 

The quote in the book is:


  Expressed in another way, sin is living the lie of believing oneself to be self-created, self-sustained, self-dependent.


It's not exactly the same as the quote you find out there, but its pretty close, so what likely happened is the quote got mis-attributed to Augustine when it was actually a summary of his teaching.