The difference between the service of the Creator and secular activities in regard to trust in GD may He be exalted is as follow. In secular affairs, it has not been revealed to us which means are better or worse than other means or which are harmful or not harmful, for we do not know which profession is best for us and more worthwhile for securing a livelihood ( preserving) health and for general wellbeing nor do we know which business venture journey or other worldly pursuits will succeed when we try them. It, therefore, follows that both in making a choice and implementing it, we must trust in GD that He will help us attain what is for our good. We must apply ourselves diligently to our work and beseech Him to stir our hearts to choose what is good and proper for us. pg 431