I'm reading in Psalm 1 about the person who "delights in the law of the Lord" and who "meditates on it day and night." This person gains a special privilege.
We're told that "whatever he does prospers."
Prospers! Don't you think of wealth and success? Don't you think of some kind of gain?
I'm learning to think about prosper in the sense of flourishing, growing stronger, becoming healthy. It's a better, more accurate way to think about this promise. Whatever we're doing, as we delight in God and meditate on the scriptures, we receive assurance that these spirit-led things flourish and grow. They become strong and healthy in unusual and unexpected ways.