The highest and most important purpose of Christ in the plan of redemption or salvation is the call to fellowship

That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ (1 John 1:3).
The highest and most important purpose of Christ in the plan of redemption or salvation is the call to fellowship. The reason Jesus died for our sins is because fellowship with God wasn’t possible, until man was saved from sin and its consequences. So, salvation from sin was a means to a higher purpose, which is fellowship.
Fellowship is a call to oneness; it includes participation, partnership, association, communication, contribution, communion, and intimacy. Can you imagine that God calls us into such a fellowship, where everything He owns belongs to us, as much as it does Him? Is that a possibility? Emphatically yes!
That’s what Christianity is about; we’re in fellowship with the Father, and with His Son, Jesus Christ. This is the most sublime of all the blessings in Christianity—our inextricable oneness with the Lord. The prayer of Jesus in John 17:20-21, where He said, “…That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us...” is fulfilled in us today. We’ve become one with divinity. We’re in Him, and He’s in us.
Through the Spirit, you’ve been immersed into Christ, literally joined with Him as one divine creation. You ought to enjoy that fellowship every day; it’s not something you go into and come out of, for you’re in Him, and He’s in you. 2 Corinthians 5:17 says, “Therefore if any man be in Christ, he is a new creation….” Colossians 1:27 says, “…Christ in you, the hope of glory.” So, just like Jesus, you’re in Him, and He’s in you.
No wonder He says greater is He that’s in you than he that’s in the world (1 John 4:4). The consciousness of this truth will change your life forever, and give you a unique mind-set, where you walk in victory and dominion in everything and everywhere. Hallelujah! .