In the Body of Practical Divinity, English Baptist and Calvinist John Gill (1697-1771) lays out responsibilities of church members to one another. The second of these is that they keep the unity. Here are some good remarks. He notes that unity is not an end in and of itself, but that it is grounded in something external to it. In his last point he warns against disturbing this unity through violating the regulative principle.
Secondly, it is incumbent on church members, as much as in them lies, to endeavour to “keep the unity of the spirit in the bond of peace;” to press to which the apostle uses various arguments in Ephesians 4:3-6.