The first noun, διδαχή, provides a good example of what was said above about the two wrongly opposed interpretations of this verse. The steady persistence in the apostles’ teaching means (a) that the Christians listened to the apostles whenever they taught and (b) that they assiduously practised what they heard. The διδαχή of the apostles cannot be sharply or consistently distinguished from their preaching. In addition to the present passage the word occurs at 5:28, where it undoubtedly refers