Who can utter the mighty acts of the Lord? - Who can speak the great things of God? Who can find language which will suitably express what he has done, or which will “come up” in sublimity to his acts? In other words, human language must fall immeasurably short of adequately expressing the praises of Yahweh, or conveying the fullness of what he has done. Who has not felt this when he has endeavored to praise God in a proper manner? Compare the notes at Psalms 40:5.
Who can shew forth all his praise - Hebrew, “Cause to be heard.” That is, Language cannot be found which would cause “it to be heard” in a suitable manner.