26 the mystery that has been kept hidden for ages and generations, but is now disclosed to the Lord’s people.

Read Colossians 1:26 Using Other Translations

Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints:
the mystery hidden for ages and generations but now revealed to his saints.
This message was kept secret for centuries and generations past, but now it has been revealed to God’s people.