Psalm 21 is another psalm written by David, a song where the king gives thanks to God for the victory. God gave multiple victories to David, to the people of Israel, in the same way, God has given us different victories also throughout our career in Christianity, and that is enough for us to give glory to God for His might.
The psalmist wrote:
Be thou exalted, Lord, in thine own strength: so will we sing and praise thy power.
This verse is an incredible worship to God, as Clarke said: Be thou exalted O Jehovah – your creatures cannot exalt you”. It is like saying: “We are so small that no matter how much we worship and praise it is not enough, because You, oh beloved Lord, are so great and powerful, so Be thou exalted, O Jehovah in your power!”