John 1:7 “But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin.”
Fellowship comes from the Greek word, KOINONIA, which means “to share in common.” Christian fellowship is more than attending Church — it is “assimilating” into the body of believers, becoming “one” in worshipping, loving, caring and sharing. According to the scripture, fellowship is not an optional matter for believers. It says, “if walk in the light [in fellowship with God]… this causes us to have fellowship with one another.” And from the outcome of this fellowship, “the blood of Jesus, His Son, cleanses us from all sin” (1 John 1:7).

• Fellowship means being a part of a group, a body of people. It is opposed to isolation, solitude, loneliness, and our present-day independent kind of individualism. Of course, it does not stop there because we can be in a crowd of people and even share certain things in common, but still not have fellowship.
• Fellowship means having or sharing with others certain things in common such as interest, goals, feelings, beliefs, activities, labor, privileges and responsibilities, experiences, and concerns
• Fellowship can mean a partnership that involves working together and caring for one another as a company of people, like a company of soldiers or members of a family.