David states the reason for praising his Lord. His acclimation is because the LORD, whom he prayed to is worthy of praise. All should have a reason to praise the LORD. This reason is best and always true; Jesus is worthy. If for no other reason, I can and will praise the Lord Jesus who is worthy of praise and honor.
The physical world is not all that exists. Realms and entities exist that transcend the physical universe. Extensions of creation exist that are beyond current human comprehension. Even known creations such as time, light, and consciousness have yet to be defined and understood properly by mankind. (John 1:1-4, 14) Even the universal constants discovered and used in mathematics, physics, and science (i.e. speed of light, tau, gravitational constant, Planck constant, etc.) were created by the One True God, Jesus. Thus, he is worthy of praise.
The known physical world in all its vast array is full of wonder and awe. Jesus created them all – fluorescent sunsets, kaleidoscope mornings, flickering fires, infant eyes, gentle touches, spice aroma, fruit’s tang, romantic orchestral, I love you whispers, joy, hope, and love. He is indeed worthy of all praise. Do I need any more reasons? No. But I have them just as well.