 Spiritual Law is more powerful than physical law (e.g. gravity).    Christ came teaching us Spiritual Law.  
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Repentance includes changing our thinking from being carnally minded (focused on natural law) to being Spiritually minded (focused on Spiritual Law ).
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The Spiritual Law of ~ Sowing and Reaping ~ works in the natural realm and it works in the Spiritual realm.  So does the Law of Giving :<br>~ Give and it shall be given to you, good measure,  pressed down, shaken together and running over~.