Not only did Jesus pray that we would be one as He and the Father are one, He also provided a meal to unite us. He Himself is the meal, His body the bread, His blood the wine, broken and poured out all for love. He gave His flesh so that we could enjoy familial fellowship as part of His household.
The cup of blessing that we bless, is it not a participation in the blood of Christ? The bread that we break, is it not a participation in the body of Christ? Because there is one bread, we who are many are one body, for we all partake of the one bread. (1 Corinthians 10:16–17, ESV)
When we sing songs such as Glorious Day, and as we think about Jesus our Redeemer, the suffering sacrifice who bore our sins and carries them far away, note that the day of our forgiveness isn’t the glorious day, though that day was great. The day of His coming is the glorious day. One day He’s coming, because what He did isn’t just a message of justification to be believed, He is the Beloved One meant to be known forever.