Psalm 47:7 NKJV
For God is the King of all the earth; Sing praises with understanding.
The psalmist here says we should sing praises to God with understanding. He says that God is King of all the earth. When you come before a dignitary, if you are going to give praises to that person, you would know something about them so you could speak intelligently – with understanding. How much more should we speak with intelligence and understanding when we praise the highest dignitary – God, who is King of all the earth. We should refrain from saying things we don’t understand. We need to mean what we say to God, and how can we do that if we don’t understand what we are saying. The only time it is legitimate to praise God without understanding is when we praise Him in our heavenly language. Then we understand that the Holy Spirit is helping us praise Him perfectly.