PSALM 100

1 Shout for joy to the LORD, all the earth. 

2 Worship the LORD with gladness; 
come before him with joyful songs. 

3 Know that the LORD is God. It is he who made us, and we are his; 
we are his people, the sheep of his pasture. 

4 Enter his gates with thanksgiving and his courts with praise; 
give thanks to him and praise his name. 

5 For the LORD is good and his love endures forever; 
his faithfulness continues through all generations.

Verse 3 calls us to know God. If we only knew the magnitude and extent of His majesty and beauty, we'd take Him less for granted, we'd realize how unworthy we are of the grace He extends to us. We'd realize fully that nothing has any purpose apart from bringing Him praise and glorifying His name. That's probably why when any of the prophets saw a vision wherein they entered the presence of the Lord, they fell face down.

Verse 3 also says that it is He who made us and we are His.Yet He gives us the choice of exercising our free will! We are His people, the sheep of His pasture. He keeps us alive, well, kicking. Anything we have or are is because of Him. Yet we live on His pasture, enjoy blessings He gives and turn around and question Him, rebel or complain.

Therefore the Psalmist calls us to know our God. That would result in us naturally bringing Him obedience, thanks and praise.