The separation of secular and sacred is rooted in Gnostic Dualism. The belief that the perfect state of man and woman is spiritual. There is a perfect design or blueprint of a person. The only way to reach perfection is to shed the physical state and become a perfect spirit.
This is not Biblical. God made us with a physical body. When Christ returns and makes a new heaven and earth, we will have physical bodies. Christ himself is raised from the dead in his physical body and ascended into heaven in his physical body. We will be like him in the resurrection. We are made to be physical.
In the creation narrative Adam and Eve were gifted the responsibility of tending the garden. The command to subdue the earth is prior to the fall (Gen 1:28). The narrative then moves into a detailed look at Adam and Eve. God commands Adam to tend the garden God made (Gen 2:15). The intent for responsibility and work is present before the curse.
The curse after disobedience extends from our calling to be stewards of the earth. Adam’s curse was to toil with the ground. His job and life endeavor did not change.
The law that God gave to the Israelites continues the theme of earthly importance. Contrary to several surrounding religions, God gave commands regarding food, building their houses, and even their waste hygiene. Other religions gods did not care about the ‘earthly’ and ‘mundane’, only the spiritual.
Our spiritual health is important. But the spiritual is present here. The laws given to the Israelites to separate them from the surrounding nations were specific regarding how they lived their physical life. The Israelites were commanded to be different in their daily lives.
Finally, as James tells us, “Show me your faith without your actions and I will show you my faith by my actions.” The actions that show our faith is every aspect of our lives. Job, free time, shows we watch and don’t watch all point to what we believe in.