Both these Psalms are an encouragement to praise the Lord, especially to praise him with music and song: Let us come before him with thanksgiving and extol him with music and song.
Psalm 150 begins and ends with the words, Praise the Lord or Hallelujah. The verses in between invite us to praise, telling us where and why to praise, and instructing us how to. We praise God because of who he is and because of what he has done, his surpassing greatness and his acts of power.
We praise him supremely because of what he did in sending Jesus to be our Saviour and Lord. We praise him with music, with song, and with our very lives. Psalm 150 expresses the sheer exuberance of lives given to God.
We thank God for lives devoted to him, who praise him day by day. The challenge comes to each one of us to use our talents and gifts, whether they are musical or whatever, to praise God and extend his kingdom. Also, in these days of coronavirus pandemic, many are discovering new talents and gifts for ministering in unexpected and exciting ways.
I finish this short thought with a prayer of praise I came across recently:
from the moment your spirit
hovered over the waters of this earth,
we were part of a vision
held lovingly within your heart.
From the moment you spoke
and separated darkness from light,
you created space
where we might one day walk.
From the moment your joy
spilled out into green and living things,
your beauty was revealed
for us to taste and see.
for this world,
beauty and majesty,
passion and artistry,
a green and pleasant place,
we praise your mighty name.