He looketh on the earth, and it trembleth: He toucheth the hills, and they smoke.
God created this world and He wants us to appreciate the fact that He created ita nd it is His. If God rejoices in the world that He has made, so should we. If it is the job of a Christian to love what God loves and hate what He hates, then we should have a love for the world that He has created. Let's take some time to appreciate this world.
 I will sing unto the LORD as long as I live: I will sing praise to my God while I have my being.
 My meditation of Him shall be sweet: I will be glad in the LORD.
 Let the sinners be consumed out of the earth, and let the wicked be no more. Bless thou the LORD, O my soul. Praise ye the LORD.
These verses encourage us to sing out to God. In context of the entire Psalm, we are exhorted to appreciate the world in which we live and sing out to God for creating it in the first place. Think of it this way, if I have nothing else to be grateful for, I can always thank Him for this world He has created. Even if I don’t appreciate how it looks, I can appreciate it as He intended it to be when it was first made.
This Psalm ends on a strange note. After spending a lot of verses praising Him for this created world, verse 35 mentions the death of those who refuse to turn to Him with their lives. Why? I believe the answer is that only those who care about God would be willing to take the trouble to praise Him for this world. Those who don’t care about God are too busy with their lives to appreciate what He has done for them.
The chapter ends with another call to praise the LORD. When we read of all the good things God has done for our lives and the world He has created for us, it should get us every now and then to praise Him for what He has done for us. If it is the goal of believers to live a life pleasing to Him, I believe it is necessary to praise Him regularly for the sake of our own lives here and now. The act of praising God gets our soul to focus on Him and gives us the ability to live a life pleasing to Him in the first place.
This Psalm actually ends with a reminder that while the nonbeliever will be “removed” one day from God’s presence, those of us who trust in Him, will continue to grow in that trust. Again we do that by praising Him with our souls and that starts today and not just when we get to heaven.