A Prayer by Augustine of Hippo, Late Have I Loved You. It is in Richard Foster's, Prayers from the Heart, p.50. This was used as a part of the 21 Days of Prayer at my church (http://www.cmfmc.com/).
Late have I loved you, O beauty so ancient and so new.
Late have I loved you! You were within me while I have gone outside to seek you. Unlovely myself, I rushed towards all those lovely things you have made. And always you were with me, and I was not with you.
All these beauties kept me far from you—although they would not have existed at all unless they had their being in you.
You shattered my deafness.
You drove away my blindness.
You shed your fragrance, and I drew in my breath, and I pant for you. I tasted and now I hunger and thirst. You touched me, and now I burn with longing for your peace.