O GOD, to Whom every heart is open, every desire known, from Whom no secret is hid: Purify the thoughts of our hearts by the inspiration of the Holy Spirit, that we may love Thee perfectly and praise Thee worthily; through Jesus Christ, Thy Son, our Lord, who livest and reignest with the Father and the Holy Ghost, ever one God, world without end. Amen. (Oremus, 1925, p.132).