a secret of God's purpose, hidden in past ages and now opened up to his people
In the world the New Testament writers grew up in, this Greek word first brought to mind the hushed, members-only rituals of pagan religion: a secret you were sworn never to repeat. But that is not where the biblical writers got their meaning. They took the word over from Jewish use, where it had become the standard translation of an older Aramaic term for a heavenly secret, the kind of thing the book of Daniel has in view when it says God in heaven reveals secrets and shows kings what will happen in days to come.
That background shapes every New Testament use. The word almost never means a puzzle no one can solve, or a truth so deep it stays out of reach. It means something God had kept to himself and has now made known. The drama is in the timing: it was hidden, and now it is out in the open. So the same letters can say the secret was kept quiet for long ages and then go on, in the next breath, to announce it plainly to anyone who will listen.
The senses below are not really different meanings of the word. They are the different things this one revealed secret turns out to be about:
- God's whole rescue plan now centered on Christ
- the surprising welcome of non-Jewish peoples
- the way the dead will be changed
- the meaning hidden inside a vision's symbols
Run through them all and the shape stays the same, a secret of God now disclosed, which is why they belong under one heading.