I Peter 1:10-12
The salvation that Christ has obtained for us, and which we look forward to with such certainty, did not come ‘out of the blue’. It was promised through the prophets of the Old Covenant, who were inspired by the Holy Spirit – the Spirit of Christ – to speak of Christ (Luke 24: 25-27). This fact tells us that there is no fundamental divide between the message of the Old and New Testaments. The aim of the prophets is essentially the same as that of the apostles: they point to Christ.
It would be true to say, however, that many of these prophecies were not fully understandable until Christ actually came – things concerning the sufferings of the Messiah and the extension of God’s mercy to the Gentiles, for example. The believers of the old covenant had to be content with hints and glimpses; but for us the ‘mystery’ has been fully revealed (Ephesians 3:4-6), and we see the complete picture in all its glory (Romans 3:21,22). And it is still being made known throughout the world, in the preaching of the Gospel. Do we realise what a privilege we have? (Matthew 13:16,17) Are we as amazed and as enthusiastic about our salvation as the angels are?