The deep foundation of Christian unity is laid in the divine Christ.
Here, as generally in the New Testament, the name 'Lord' designates
Christ in His authority as ruler of men and in His divinity as
Incarnation of God. It would not be going too far to suggest that we
have in the name, standing as it does, for the most part, in majestic
simplicity, a reference to the Old Testament name of Jehovah, which in
the Greek translation familiar to Paul is generally rendered by this
same word. Nor can we ignore the fact that in this great catalogue of
the Christian unities the Lord stands in the centre of the three
personalities named, and is regarded as being at once the source of the
Spirit and the manifestation of the Father. The place which this name
occupies in relation to the Faith which is next named suggests that the
living personal Christ is the true uniting principle amongst men. The
one body realises its oneness in its common relation to the one Lord. It
is one, not because of identity in doctrine, not because of any of the
bonds which hold men together in human associations, precious and sacred
as many of these are, but 'we being many are one bread, for we are all
partakers of that one bread.' The magnet draws all the particles to
itself and holds them in a mysterious unity.