If there is a single prayer that summarizes a “theology of Sundays” it is this collect. The Lord’s Day is associated with many things – God’s reign over all creation, the resurrection of Jesus, and the many spoils and great redemption wrought through that victory. It is from that resurrection power that Christian derive courage, boldness, and obedience to live for him both today and in anticipation of the last great Day. The worship on this day therefore leads to the works throughout the week, and in so doing we sanctify time itself (cf. Question 298 in the Catechism, To Be A Christian).
Among this list of collects, this one is the only one that is not the same in the 1979 Prayer Book. That prayer for Sundays in Morning Prayer was short both in length and in theological and devotional content. Ironically, the prayer we have appointed instead was written originally for the 1979 Prayer Book, where it was found as Occasional Prayer #69.
O God our King,
by the resurrection of your Son Jesus Christ on the first day of the week,
you conquered sin, put death to flight, and gave us the hope of everlasting life:
Redeem all our days by this victory;
forgive our sins, banish our fears, make us bold to praise you and to do your will;
and steel us to wait for the consummation of your kingdom on the last great Day;
through Jesus Christ our Lord. Amen.