Albert Barnes Commentary Psalms 9:2

"I will be glad and exult in thee; I will sing praise to thy name, O thou Most High." — Psalms 9:2 (ASV)

I will be glad – I will rejoice, and will express my joy.

And rejoice in thee – I will exult; I will triumph. That is, he would express his joy in God – in knowing that there was such a Being; in all that God had done for him; and in all the evidences of God's favor and friendship.

Will sing praise to thy name – To you; the name often representing the person.

O thou Most High – You who are supreme – the God over all. See the notes at Psalms 7:17.