After 150 Psalms of prayer, thanks and praise to the Lord the Psalter closes with pure praise, with everyone everywhere using all the gusto, noise and energy they can muster. We have a problem: How do we render to God adequate praise? All Creation, pulling out all the stops, could never in all eternity repay God with enough praise to make it even.
We can never do enough to ever feel like we have paid Him back or earned His mercy. We are forever obligated and in debt the Lord. He has really done it all. Therefore, all we can do is continually praise Him.
Praise makes God big; we can’t make God bigger and better than He already is, but praise can make Him appear bigger to us than we previously imagined. When I see God as bigger than my problems, more faithful than I thought, more merciful than I can believe, more ready to answer my prayer than I am even to ask it, then praise fulfills its purpose: it allows me to see what is already there, a big God. God fills up my space, time, thoughts and plans that there is no room for the enemy. So I praise the Lord!