Worthy of praise is actually one word, our word "Halal." The word can mean to shine, to praise, to boast, or to be worthy of praise, as in this instance.
A good illustration would be a piece of iron that is magnetized. The magnet comes across iron shavings that are immediately drawn to it. God is like that magnet, and our praises are like those shavings. God’s worthiness to be praised corresponds to our desire to praise Him. He is worthy of praise and we are eager to praise Him. Our praises are drawn to Him.