The Bible teaches about one church/body.

Ephesians 4:1-6

I Corinthians 1:9-13 - Christ’s church. Individuals make up the bod of Christ, not denominations.

“But denominationalism is Scriptural because Christ is the head of each division of His church.”

There are no divisions of Christ’s church.

Matthew 7:21-23 - We cannot do other than what God commanded and still be in Christ.

Practical applications

Be a member of Christ’s one church.

Study and learn Christ’s one truth. I Corinthians 12:13