G-d weakens Nature to Make Miracles

 Rabbeinu Bachya (Shemos 17:13) “Joshua weakened, etc.” The word “he weakened,” is testimony that G’d does not totally destroy and make ineffective the forces of the horoscope, and that He does not force nature not to pursue its assigned tasks unless there is an overwhelming and urgent need for this. The reason that He does not destroy the system is simply that he Himself created it. Why should G’d uproot His own handiwork? Nonetheless, G’d from time to time “outwits” the system in order to save someone whom He wants to save; He continues to operate His system of reward and punishment without destroying the system of the laws of nature in the process.