Have you read Augustine's Confessions?  If your immediate reaction is that it is a "religious" book and not necessarily deserving of your time, I say that although the first part of your response is accurate, the second is not.  It is more than deserving of your time.
     Why?  Augustine's life is ours.  His quest for meaning and his various detours through cultural debauchery and theological gibberish speak to all of us.  We all detour, we all stumble.  We all seek purpose.  So did Augustine.  Yes, he found his purpose in God, which might be a a somewhat jarring conclusion to some today.  If we did deeper, however, we see that, in truth, he could not have found purpose any other way.

     I think about a question posed by many a philosopher over the ages, a question that summons us to consider the absolutely seminal fact of reality:  "Why is there something rather than nothing?"  Indeed, why?  Cosmology has done much to show us how the universe came into being.  It has not yet been able to show us why it did.  If we respond that the "why" doesn't matter, we must then answer another question:  why do we even say that?
     Augustine understood that we cannot ask why unless there is a reason for a "why" in the first place.