Two words are repeated seven times in Psalm 30--"you have." David is praising God for what He had done for him. Are you doing that today? Perhaps you've seen the plaque that says, "Prayer changes things," and that's true. I've also seen a plaque that says, "Praise changes things," and that also is true. It's amazing how our whole attitude and whole outlook can be transformed by praising God.
In verse 6 David gives a testimony: "Now in my prosperity I said, 'I shall never be moved."' When we have prosperity without humility, it leads to adversity. Why? Because we start to be more concerned with things than we are with God. David said in his prosperity, "I shall never be moved." But then he found out that he could be moved. He found out that his prosperity did not guarantee security. So instead of saying "I shall" or "I shall not," he began saying "You have." He submitted his will to God's will. "You have" defeated the enemy. "For You have lifted me up, and have not let my foes rejoice over me" (v. 1). "You have" given me victory. "You have" answered prayer. "You have healed me" (v. 2). "You have brought my soul up from the grave; You have kept me alive" (v. 3).
God did some marvelous things for David. He defeated his enemy, answered his prayer, saved his life and established him (v. 7). And then He gave him joy. "You have turned for me my mourning into dancing; You have put off my sackcloth and clothed me with gladness" (v. 11). Do you want your life to be transformed today? Move from "I shall" to "You have" and, in humility, praise God for what He has done.
Submitting to God is an exercise in humility. Until you humble yourself before Him and concern yourself with the things of God, you will not become established. For God to work in your life, your will must be aligned with His. Are you submitted to Him? If not, humble yourself before Him and allow Him to transform your life.