I am praying this prayer as well out of Tozier's book The Pursuit of God. This one is at the end of chapter 2:
Father, I want to know Thee, but my cowardly heart fears to give up its toys. I cannot part with them without inward bleeding, and I do not try to hide from Thee the terror of the parting. I come trembling, but I do come. Please root from my heart all those things which I have cherished so long and which have become a very part of my living self, so that Thou may enter and dwell there without a rival. Then shall Thou make the place of Thy feet glorious. Then shall my heart have no need of the sun to shine in it, for Thyself will be the light of it, and there shall be no night there. In Jesus' name. Amen.