What does Psalm 148 7 mean?

Answer 1

The Earth and Its Creatures Glorify Jehovah

Psalm 148 enumerates other ways in which creation declares God's glory. Verse　7 reads: "Praise Jehovah from the earth, you sea monsters and all you watery deeps." Yes, the "watery deeps" are full of wonders that highlight God's wisdom and power. The blue whale has an average weight of 120　tons-as much as 30 elephants! Its heart alone weighs over 1,000　pounds [450　kg] and is able to pump some 14,000　pounds [6,400　kg] of blood through its body! Are these mammoth sea monsters slow and clumsy in the water? Hardly. They "zip around the oceans" at impressive speeds, says a report by European Cetacean Bycatch Campaign. Satellite tracking showed that "one animal migrated more than 10,000　miles [16,000　km] in 10 months."

The bottle-nosed dolphin normally dives to depths of 150　feet [45　m], but the deepest recorded dive for a dolphin is 1,795　feet [547　m]! How does this mammal survive such a dive? Its heartbeat slows down during the dive, and blood is diverted to the heart, lungs, and brain. Also, its muscles contain a chemical that stores oxygen. Elephant seals and sperm whales can dive to even greater depths. "Instead of fighting the pressure," says Discover magazine,

"they let it collapse their lungs completely." They store most of the oxygen they need in their muscles. Clearly, these creatures are living testimony to the wisdom of an all-powerful God!

Even seawater reflects Jehovah's wisdom. Says Scientific American: "Every drop of water in the top 100 meters of the ocean contains thousands of free-floating, microscopic flora called phytoplankton." This "invisible forest" cleans our air by drawing out billions of tons of carbon dioxide. Phytoplankton generates more than half of the oxygen we breathe.

Answer 2

King David himself is the "messiah" who is mentioned in this verse, since he was anointed with oil (1 Samuel ch.16) as king. Speaking from personal knowledge, King David is saying in this verse (Psalms 20:7) that God is a protector and savior, and he (King David) himself has witnessed this in his own experience.

Answer 3

The Lord is my strength and my shield, in Him my heart has trusted, and I am helped; therefore my heart greatly rejoices, and with my song I will praise Him.

It means what it says. King David is stating that it is God who gives him strength and victory. He (David) trusts in God, and God responds by helping him. This brings joy and moves his heart to praise Him.