The phrase is from something by Charles Grafton (1830-1912), the 2nd Bishop of the Episcopal Diocese of Fond du Lac:

"Rest in the smile of Jesus, be detached from self, even from your own growth in grace. Don’t be worried if you are not getting on, try, but do not worry. It hinders His work, be patient, leave self to God, and pray Him to make you what He would have you to be. He has His plan for each soul, and so, we can have no plan of saintliness: be willing to be like one of the “queer things” in the medley among beautiful pictures and statues, one of His odd works of grace, different, singular, peculiar, hard to make, but having its own place in the owner’s heart.”

I love the whole quote. It captures something of the mercy and delight of God as revealed in Jesus Christ. And I consider myself, in more ways than one, to be an odd work of grace.