The words ‘to fulfil’ reminds us that the prophets prophesised that even the Gentiles would be brought in to the church and saved. The sublime secret and mystery, the hidden mystery – what is it? Well, it is the message of the gospel.
The silent Christian is a disaster. He has been given the mighty privilege of light and understanding, a secret shown to him, and he will not make it known. What a tragedy, the quiet church, the quiet Christian, the non-striving, reaching-out believer. That is the effect this should have. All these verses talk about authentic evangelism.