Psalm1

"Happy the man
who never follows the advice of the wicked,
or loiters on the way that sinners take,
or sits about with scoffers
but finds his pleasure in the law of Yahweh,
and murmurs his law day and night."
Psalm 1:1-2

What would it mean to MURMUR God's law both day and night? The image is actually a bit odd it would seem. It brings to mind a person who walks around talking to themselves all day long but who you never quite know what they are saying.
Maybe it is an image that we should emulate in some ways. The Bible invites us to "pray unceasingly" and maybe this is what it looks like. To go through our day carrying on a conversation directly with God. To murmur with God about the things of this world like bills to pay, conversations to have, decisions to make, etc. etc. . Maybe our whole lives could reflect an active engagement with God about the things of this world as well as the next.
It might do us all a little good to murmur more and be happy.