Charity can be equated to agape’ love. This kind of love is aid and comfort given to someone without qualification. Churches often fall short of this because as individuals they expect to receive appreciation. But that would be qualifying the nature of the recipient.
Besides wanting to call on God, we’ve already made a visible expression of wanting to follow Christ. As we have been raised to a new life in Baptism; we should seek out those things that are pure and represent the purity or holiness of God and Jesus.
Jesus prayed that the disciples would build the church after Jesus was resurrected. Now He prays for us as the results of their evangelism and the generations of believers through the ages.
I benefited from the unity I experienced by literally seeing the Holy Spirit working among His saints. I also believe the Holy Spirit has given me a heart for “church” unity. Now I know about the glory Jesus has in Heaven, but I’m not as comfortable with His glory here on earth.