This is a good point. The only true unity in the Church and in the universe for that matter is found in the community of the Trinity. Christians, true Christians, can be unified in foundational truths, such as Salvation by faith in Christ alone, the virgin birth, the deity of Jesus. They may never agree on the peripheral doctrines such as styles of worship, versions of the Holy Bible, or whether drinking alcohol is permissible or not. The Church of Christ has many windows, but only one door; and that Door, is Jesus Christ. If we get that right, we'll have unity. The rest is just preference.
I heard this story about two believers from different worlds:
"During the Cold War, a Christian from the U.S. was visiting Romania. It was a gray, cold day, and all the faces around him reflected that gray, cold atmosphere. But in the midst of the gloom, the Christian man heard someone whistling a tune. It was an old hymn, 'The Great Physician now is here, the sympathizing Jesus.' "The Christian man spotted the whistler and began walking alongside him. Because Christians were persecuted by the government, he took care not to publicly identify his allegiance. He simply began whistling the same tune. The Romanian man stopped, a big smile spreading over his face. He pointed to heaven. So did the American man. He pointed to his heart. The American did too. Then he reached out and grabbed the American in a big bear hug. Neither man could speak the other's language, but they knew instantly that they were brothers in the faith. "
