David, the king, always pointed any success he had to the Lord. As he fought in hand-to-hand sword battles, he could sense his strength was from the Lord. He was glad in that strength God provided.
“O LORD, in Your strength the king will be glad, And in Your salvation how greatly he will rejoice!” (Psalm 21:1 NASB).
When David spoke of salvation, it was often in relationship to the battles he fought. God saved him from injury and even death in the battle. God was his salvation. In that he would rejoice. This word “rejoice” here means to spin or circle around in “vigorous enthusiastic expressions of joy.” He would dance for joy.
“And He said to me, “My grace is sufficient for you, for My strength is made perfect in weakness” (2 Corinthians 12:9 NKJV). Our strength is from the grace of God. His strength is perfected in us through faith in the finished work of Jesus. It is sufficient for every battle and every situation you face. It’s the strength that makes you glad and rejoices for joy.