"What are you, then, my God?"

I've just started reading St. Augustine's Confessions, and although I'm not very far into it (four pages. I did say not very :) ), I am finding myself amazed, most particularly at this point by the following utterly contradictory yet beautiful description of God: 

"What are you, then, my God? What are you, I ask, but the Lord God? For who else is lord except the Lord, or who is god if not our God? You are most high, excellent, most powerful, omnipotent, supremely merciful and supremely just, most hidden yet intimately present, infinitely beautiful and infinitely strong, steadfast yet elusive, unchanging yourself though you control the change in all things, never new, never old, renewing all things yet wearing down the proud though they know it not; ever active, ever at rest, gathering while knowing no need, supporting and filling and guarding, creating and nurturing and perfecting, seeking although you lack nothing. You love without frenzy, you are jealous yet secure, you regret without sadness, you grow angry yet remain tranquil, you alter your works but never your plan; you take back what you find although you never lost it; you are never in need yet you rejoice in your gains, never avaricious yet you demand profits. You allow us to pay you more than you demand, and so you become our debtor, yet which of us possesses anything that does not already belong to you? You owe us nothing, yet you pay your debts; you write off our debts to you, yet lose nothing thereby."
                                                         - St. Augustine, Confessions, Book One 4,4.