In other words: God is going to be praised, if not from your lips then from the rocks and trees and rivers.
We don't determine when God can be praised. It's happening whether we participate or not. And someday, even the Pharisees and their like will worship God. Romans 14:10-12 says,
For we will all stand before the judgment seat of God; 11for it is written,I don't want to stand before God and have Him tell me that the rock in my wood chips did a better job praising him. Oh, that I wouldn't be ashamed to give You praise!
"As I live, says the Lord, every knee shall bow to me,
and every tongue shall confess to God."
12So then each of us will give an account of himself to God.
The thought for this post comes from a song written by my brother. Take a listen.
If I don't cry, a rock will cry out.
Praise will happen whether 'not you hear this man shout!
But, if I don't howl, then let it be heard,
"Foul!" from the creature, every boulder and bird.
Cry out! Cry out! Brother won't you?
Are you not affected when the Lord rides through?
Cry out! Cry out! Sister, what say?
Will the pebble beat your lips to Jesus today?
If I won't yell, well, what's there to fear?
"Hell's not a heater that you dare stand near.
If you won't wail, brother, angels still say,
'Hail to the Holy, Holy, Holy this day!'"
If you don't groan, still it should be known:
Man does not determine when the Lord's on His throne.
If you won't weep, then of you 'twill be said:
"The field stone's wiser than the rock in his head."