Charles H. Spurgeon on Psalms 97:12

Rejoice...and give thanks. Two things are to be observed: One, that he unites joy in the Lord and praise of God. Rightly: for it is not possible for a man to praise the Lord truly and from the soul, unless he rejoices in Him. Another, that he connects the praise of God with the remembrance of his holiness. And with good reason: for it is the chief use of divine praise, that by the exercise thereof, we should keep fresh in our souls the remembrance of God and of all the blessings received from Him. Thus this verse contains the root and fruit of divine praise. The root is joy in God; the fruit is the remembrance of God and his goodness. —Musculus.