Our unity with Christ… is terribly important and perhaps the most critical doctrine of salvation in Paul’s writing.
~ James Montgomery Boice
Union with Christ is really the central truth of the whole doctrine of salvation not only in its application but also in its once-for-all accomplishment in the finished work of Christ.
~ John Murray
The subject of spiritual union is the most important, most profound and yet the most blessed of any that is set forth in the sacred Scriptures; and yet, sad to say, there is hardly any which is now more generally neglected.
~ Arthur Pink