It is good to praise the Lord and make music to your name, O
proclaiming your love in the morning and your faithfulness at night,
to the music of the ten-stringed lyre and the melody of the harp.
For you make me glad by your deeds, Lord; I sing for joy at
what your hands have done.
How great are your works, Lord, how profound your thoughts!
So often we only praise the Lord only when things are going well in our lives. David had many highs and lows in his life yet he was able to say it is good to praise the Lord. We sing for joy at what God has done. He has saved us by his grace. Isn't that a good enough reason to say, "It is good to praise the Lord"