We have gathered around one table to partake of one bread, and this is a symbol of our unity. There is one Lord, one faith, one baptism, one God and Father of all. Paul adds to all of this that there is one Spirit. You are, no doubt, individuals. Each of you have particular body with a particular soul. But you all do not have a diversity of Holy Spirits in you. You all have the same One Spirit living in you. He is not a mere force, but a being. He can be grieved. He comforts you. He convicts you. He produces His fruit in you.
The Holy Spirit is the guarantee of our inheritance. And similarly, He is the guarantee of our future unity. We have not yet attained this perfect unity. There are still many fractures in the bride of Christ. You still have relationships with other saints that are bumped and bruised. Even so, consider what our future holds given the One who already dwells within us. He will heal all of our diseases. He will mend us together into perfect unity. As you come to this table, no matter your past or present conflicts, rejoice that the Spirit is in that business.
While you should not run ahead of the Spirit and attempt to mend a particular fracture on your own, you should walk in the Spirit, being eager to maintain the unity of the Spirit in the bond of peace. Trust God for it. He has already given you the down payment. We really are one in the Spirit. Your body is the temple of the Holy Spirit Himself, and He is a stream of living water that brings healing to all wounds. So come in faith and welcome to Jesus Christ.