Morris on diversity in biblical theology
We must look at the New Testament and see what the teaching of the various writers means and whether or not the differences point to irreconcilable contradictions.
At this point, I am saying no more than that in modern congregations we sometimes find widely differing forms of expression used by people whose basic beliefs are much the same and that in the same way there may be a New Testament equivalent. There are outstanding thinkers and writers in the New Testament, but, however great their differences, we must be clear that they were members of the same community of faith; they did not emerge from some wilderness, barren of religious convictions. They were all shaped by their contact with Christ, but also to some extent by the community to which they belonged. What they wrote is Christian teaching, however individual their expression. And they all wrote under the tutelage of the same Holy Spirit. (Leon Morris, New Testament Theology, Grand Rapids: Zondervan, 1986, p. 17)