Now, About Those Differences, Part Three
Inside the Boundary
Fellowship is by definition that which is held in common. Unity is a function of that which unites. The quality of unity is always defined by the thing that unites, and the quality of fellowship is always defined by the nature of the thing that is held in common.
To speak of Christian fellowship and unity is to say that Christians hold something in common and that they are united by something. Christian unity and fellowship are not primarily experiential, but positional. All legitimate experiences and expressions of Christian unity and fellowship grow out of the real unity that exists among them.
The most basic form of Christian fellowship and unity is defined by the gospel. However else they may differ, Christians hold the gospel in common. Christian fellowship and unity are like a circle, and the boundary of the circle is the gospel.
Those who deny the gospel—whether explicitly by flat rejection or implicitly by denying some fundamental doctrine—are outside of the circle. No Christian unity or fellowship exists with someone who denies the gospel. Where no actual unity exists, any pretense of unity is the merest hypocrisy. Therefore, to profess unity or fellowship with someone who denies a fundamental of the gospel is always sinful.
Discussion