Don Carson writes of an awkward correspondence he had with an individual who criticised him for repeatedly referring to “Jesus” (rather than “the Lord Jesus Christ”) in an address.
The criticism was based on Romans 10:9 (‘if you confess with your mouth, “Jesus is Lord”…you will be saved.’)
As Carson points out, there is no reason to suppose that Romans 10:9 provides a necessary and unvarying formula for how we refer to our Lord. By such reasoning, Matthew 1:21 (“you are to give him the name Jesus, because he will save his people from their sins”) could equally be insisted upon as a formula.
Caron’s preferred approach is one which I have tried to follow as a general rule: if I am speaking from the Gospels, then I will refer to the Saviour as the Gospels tend to do, as “Jesus”. If I am speaking from the Epistles, on the other hand, I will tend to use their distinctive appellations – including ‘”the Lord Jesus Christ”.
Exegetical Fallacies (2nd ed.), p101.