Matthew 16:15 He saith unto them, But whom say ye that I am? 16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God. 17 And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven. 18 And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. 19 And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.
Jesus’ death, burial, and resurrection is the foundation of salvation coming into our individual lives when we believe and receive Him as our Lord (Romans 10:9, 10; 1 Corinthians 15:3, 4). Jesus did not die, though, just to give us a personal relationship to Him but have no relationship with one another. If you look at Matthew 16:16-19 after Peter had a revelation of Jesus, Jesus started revealing the Church to him, and then the Kingdom. Those three are related to one another; Christ, The Church, and the Kingdom. Upon the revelation of Jesus as the Christ to Peter, the Church and the Kingdom came into his view or was unveiled to him by the Lord Jesus.
When we receive Jesus as individuals we receive placement as members into a Body called the Church (1 Corinthians 12:18). Jesus is Head of a Body called the Church and the Church exercises the authority of the Kingdom in the Earth with keys of the Kingdom. It is an authority that the gates of hell cannot prevail against. The Church is not one member but many (1 Corinthians 12:12, 14, 20, 27).
Many Christians want salvation in isolation to Christ’s Body which is not Biblical. I always ask people when Jesus was on earth could you separate His head from his body? That’s what many try to do today and if you did that literally you’d have a decapitation. Many claim they have Jesus but live with no connection to His Body, the Church. Sad to say, they are practicing an unbiblical brand of Christianity and it hurts the Church and the exercise of the authority of the Kingdom. The Body needs them and they need the Body. May God grant them repentance to the acknowledging of the truth.