Worship on Sunday is Christ’s demonstration to the world that salvation is a corporate experience with individual responsibilities, not an individual experience with corporate responsibilities.
From Tabletalk Magazine:
Our worship is meant to be the chief place where we demonstrate love for God and for each other. It is the clearest place where Jesus’ prayer for us is illustrated: that we would be one (17:11, 21–23).
Every part of our worship should reflect the unity that Jesus prayed, lived, died, and rose to accomplish. But, Jesus’ promise that the way we love each other will demonstrate that we are His disciples cuts both ways. If we allow our worship to become reflective of our individuality instead of our unity, we are illustrating to the watching world that Jesus does not bring people together. An “outsider” (to use Paul’s term from 1 Cor. 14:16, 24) should be able to watch the gathered saints confess Christ as one, sing as one, pray as one, and actively listen with a unity in their devotion as Christ their Lord addresses them in the preached Word. He should be able to perceive that there is a singularity of purpose and worship. He should see the power of God to bring different people and personalities and unite them in a holy purpose and holy love.