Because there is a grandeur to God there should be a happy joy in our response. That is what the 100th Psalm is all about.
The great preacher C. H. Spurgeon, commented on the 100th psalm, saying:
“Our happy God should be worshipped by a happy people. . . .
….
Never will the world be in its proper condition till with one unanimous shout it adores the only God.”C.H. Spurgeon
Volume 2, The Treasury of David, 397.
His Steadfast Love Endures Forever
A Psalm for giving thanks.
1 Make a joyful noise to the Yahweh, all the earth!
2 Serve Yahweh with gladness!
Come into his presence with singing!3 Know that the Yahweh, he is God!
It is he who made us, and we are his;[a]
we are his people, and the sheep of his pasture.4 Enter his gates with thanksgiving,
and his courts with praise!
Give thanks to him; bless his name!5 For Yahweh is good;
his steadfast love endures forever,
and his faithfulness to all generations.
Look at the imperatives in this short psalm. “Make / serve / come / know/ enter / give thanks”. These are the acceptable response to Yahweh who alone is good, whose steadfast love endures forever, whose faithfulness is experienced in each new generation that praises His name. So let us make exuberant, joyful, loud, shouts of praise and thanksgiving and glory in being “the sheep of His pasture.”
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ChosenRebel's Blog 
A choral group that I was in during college sang an arrangement of Psalm 100 by Mendelssohn. Singing the Psalm bolstered my faith during those years
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Amen brother. The singing of this psalm by the people of God in every generation has been a bolster of faith and to faith in the Living God.
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