But here's the thing. You don't need to stop praying the old Rosary to start praying the new luminous mysteries. I'm not trying to be flip. As Catholics, we don't believe God stopped revealing Himself to us once the Bible was codified. I just can't see that it matters if we're over the number of psalms. And I also cannot see how meditating on the earthly ministry of Jesus can be a bad thing.
But you don't have to substitute these for the Holy Rosary. Do you understand THAT?