It is expedient that the church meet together often to partake of bread and wine in the remembrance of the Lord Jesus;
And the elder or priest shall administer it; and after this manner shall he administer it—he shall kneel with the church and call upon the Father in solemn prayer, saying:
O God, the Eternal Father, we ask thee in the name of thy Son, Jesus Christ, to bless and sanctify this bread to the souls of all those who partake of it, that they may eat in remembrance of the body of thy Son, and witness unto thee, O God, the Eternal Father, that they are willing to take upon them the name of thy Son, and always remember him and keep his commandments which he has given them; that they may always have his Spirit to be with them. Amen.

COMMENTARY

He shall kneel with the church and call upon the Father in solemn prayer
Yesterday I mentioned Yom Kippur, a solemn day in ancient Israel with rituals that symbolized the coming sacrifice of Jesus. Now we are on the other side of that sacrifice, and we still have rituals that point backward to it.
One of those rituals is, of course, the Eucharist or sacrament. And notice in this verse how this practice calls for being “solemn.” Though different denominations may vary in the specific details of how they carry out their sacrament, they generally maintain this same solemn demeanor, due to the respect they wish to show for the sacred event they remind us of.

That they may eat in remembrance of the body of thy Son, and witness unto thee, O God, the Eternal Father, that they are willing to take upon them the name of thy Son
And there is a second reason for solemnity in this moment. In addition to reverently remembering what has happened, we see in the words of this prayer an invitation to make a solemn commitment. All those that partake are able to renew a covenant to God to keep Christ’s sacrifice in their mind and live in a way that follows his example.
And we are best able to make a serious commitment when we are of a calm and quiet mind. Consider how it is the same with weddings. Yes those are known for their gaiety, but then everything becomes very quiet and still when the moment comes for bride and groom to make their sincere pledge to one another. It is still a happy moment, of course, but it is a moment of happy solemnity. So, too, we should be of a sober and steady mind when we make our pledges to God.