If God wants you to be wholly happy, your Thy-will-be-done must be music to His ears.
“I, thy God, have infinitely more knowledge, power and will to advance thy happiness than thou hast. Therefore seek with all diligence to submit thyself totally to My will. . . .” Catharine of Siena (b. 1347)
“Mary said, . . . ‘Let it be with me just as you say.’” Luke 1:38 (after hearing from Gabriel that she would have a Baby)