In excelso throno. Isaiah 6
On a throne exalted I beheld, and lo, a man sitting, whom a legion of Angels worship, singing together: behold, his rule and governance endureth to all ages. [Psalm 100] O be joyful in God, all ye lands: serve the Lord with gladness. Glory be to the Father and to the Son and to the Holy Ghost. As it was in the beginning, is now, and ever shall be: world without end. Amen. On a throne exalted . . .
O Lord, we beseech thee mercifully to receive the prayers of thy people who call upon thee: and grant that they may both perceive and know what things they ought to do, and also may have grace and power faithfully to fulfil the same; Through Jesus Christ our Lord. Amen.
I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God. For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith. For as we have many members in one body, and all members have not the same office: so we, being many, are one body in Christ, and every one members one of another.
Blessed be the Lord, even the God of Israel: which only doeth wondrous things. The mountains also shall bring peace: and the little hills righteousness unto the people.
Alleluia, alleluia. [Psalm 100] O be joyful in the Lord, all ye lands: serve the Lord with gladness. Alleluia.
St. Luke 2:41–52
Now his parents went to Jerusalem every year at the feast of the passover. And when he was twelve years old, they went up to Jerusalem after the custom of the feast. And when they had fulfilled the days, as they returned, the child Jesus tarried behind in Jerusalem; and Joseph and his mother knew not of it. But they, supposing him to have been in the company, went a day’s journey; and they sought him among their kinsfolk and acquaintance. And when they found him not, they turned back again to Jerusalem, seeking him. And it came to pass, that after three days they found him in the temple, sitting in the midst of the doctors, both hearing them, and asking them questions. And all that heard him were astonished at his understanding and answers. And when they saw him, they were amazed: and his mother said unto him, Son, why hast thou thus dealt with us? behold, thy father and I have sought thee sorrowing. And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father’s business? And they understood not the saying which he spake unto them. And he went down with them, and came to Nazareth, and was subject unto them: but his mother kept all these sayings in her heart. And Jesus increased in wisdom and stature, and in favour with God and man.
[Psalm 100] O be joyful in the Lord, all ye lands; serve the Lord with gladness, and come before his presence with a song: be ye sure that the Lord he is God.
[St. Luke 2] Son, why hast thou thus dealt with us? Behold, thy father and I have sought thee sorrowing. And he said unto them, How is it that ye sought me? wist ye not that I must be about my Father’s business?
Below are plainsong renditions of the Psalms as published in the Saint Dunstan’s Plainsong Psalter.