That you cannot prove to others what is God's will doesn't mean we shouldn't try or that we shouldn't act in accordance with it to the best of our ability.
لا تياسىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىى ىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىىى فرج الله قريب من غير عمليات