There exists one universal church made up of all true believers in Jesus Christ. The unity of this church is not just an ideal or a goal; it is an established fact, brought about by the working of the Holy Spirit in many souls. Any Christian who is truly saved values the grace of God above all else, and this makes him a brother of all other Christians who have the same value. Although Satan is constantly attacking the unity of God’s church and attempting to destroy it, the church remains and will always remain intact. God will protect it from destruction. As long as there are believers there will always be a church.
Sadly, there are some Christians that show little respect for the fact of church unity. They seek to deny it’s reality by pretending that other believers are not members of God’s church. They make new rules about who is in the church and who is not. They judge other Christians based on such artificial definitions such as mode of baptism, communion rites, or preferred confession. They claim that other Christians who were not baptized like them are not as “genuine” Christians as they are. However, the Bible clearly teaches that there are no separate classes of Christians: there are simply believers and unbelievers; that’s it. We must not pretend to belong to a holier caste of Christianity than believers in other denominations.
The Apostle Paul describes the spiritual unity of the church this way:
For we were all baptized by one Spirit so as to form one body—whether Jews or Gentiles, slave or free—and we were all given the one Spirit to drink. (I Corinthians 12:13 NIV)
All true believers have been baptized by the One Spirit regardless of their specific denomination or the identity of the cleric who performed their water baptism. The Spirit is not given by man, it was given by God for all true Christians to drink, and anyone who believes in Jesus Christ and repents of their sins has clearly been given the Spirit. Therefore, let us not deny God the right to give of the Spirit freely. Let us give respect to our brothers and sisters in Christ regardless of their denomination, and let us not despise the true unity of the church which has been accomplished through the shed blood of Christ.