Psalm 96 presents Jehovah to the nations in the spirit of the everlasting gospel (see Revelation 14:6-7). At the close, the heavens, earth and sea are called upon to rejoice. In its full expression, this rejoicing is shown in the last three psalms, 148, 149 and 150.
The Christian rejoices already in the thought of the day of which these psalms speak. We too own Jesus as Jehovah, but He is our Lord whom we have known by faith (whom having not seen we love) in the time of His rejection and absence, and when Israel beholds Him we shall be with Him. Then the heavens, the heavenly people, will rejoice with the earth. What hallelujahs will fill both heaven and earth when the once thorn crowned, now glory crowned Jesus is revealed to adoring hearts!