The word “worthy” means “having worth or value; of commendable excellence or merit; deserving attention, respect, admiration.” Read those words one more time. Then think about the words of Psalm 18:3 – “I will call upon the Lord, who is worthy to be praised.”
Our Lord is WORTHY to be praised! There are many reasons for that, but note the ones that David emphasizes in the verses right before this. The Lord is “my strength…my rock…my fortress…my deliverer…my trust…my shield…the horn of my salvation…my stronghold” (18:1-2). Those are easy to read over quickly. Go back and think about YOUR God being EACH of those things for YOU. Emphasize the word “my” as you read each one.
NO WONDER David gushed forth with exuberance that he could almost not contain. David was not stating some matter of fact or some calendar event. His God was “worthy to be praised,” and he knew it and longed to do it! Do we realize how worthy our God is of our praise?