We thank You, O God, for Your Holy Spirit, who incites us to true knowledge of You. We humbly entreat Your for Your Son's sake to illumine our hearts with Your Holy Spirit that we may truly call upon You, know You, sincerely believe in You, give thanks for You, and obey. Let not the light of Your gospel be taken from us through deceitful illusions. Direct us in all our affairs with the voice of Your counsel, for Your Son has promised that You would give Your Holy Spirit to those who ask. Grant this, O God, for Your holy name's sake. To You, with Your Son and the Holy Spirit, be all honor and glory forever. Amen.
Philip Melanchthon, from "For All the Saints," page 1003