GOD, who makest us glad with the yearly remembrance of the birth of thine only Son Jesus Christ; Grant that as we joyfully receive him for our Redeemer, so we may with sure confidence behold him when he shall come to be our Judge, who liveth and reigneth with thee and the Holy Ghost, one God, world without end. Amen.
Source Sacramentary of Bishop Gregory of Rome [604 AD]. This Collect was used in the Roman liturgy on the Vigil of the Nativity.
Other Homilies for Christmas: Leo of Rome[ca 450] I, II, III, IV, VI, VII & VIII
"Let us therefore follow after the things which make for peace, and things wherewith one may edify another" [St. Paul's Epistle to the Romans 14:19]
IN HOC SIGNO VINCES - TIME DEUM ET OPERARE IUSTITIAM