In a word, obedience.
Every time we disobey, we are in essence saying, “I know how to make myself happy better than You do, God.” It is identical to Eve’s sin, and it is no less stupid than hers, although we all blame her for the condition of the world.
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May His Will be done in our lives. May we accept His Will. May we never question His Will, although we often do!
Yes, we too often do. I hope that someday, I will just learn to relax and rely completely on Him!