John Calvin Commentary Psalms 96:3

"Declare his glory among the nations, His marvellous works among all the peoples." — Psalms 96:3 (ASV)

Declare his glory among the heathen. Additional terms are brought forward to commend the salvation spoken of. It is called his glory and his wonders; which is equivalent to saying that it was glorious and admirable.

By such titles, the Psalmist intended to distinguish it from any deliverances that had previously been granted, for indeed, there can be only one opinion that when God appeared as Redeemer of all the world, he gave a display of his mercy and of his favor such as he had never bestowed before. This salvation, as I have said, the Gentile nations could not possibly have celebrated had they been left without it.

These words teach us that we can never be said to have rightly apprehended the redemption accomplished by Christ unless our minds have been raised to the discovery of something incomparably wonderful about it.