First, if religious works were crucial to achieving a good standing with God, then there would always be a fundamental difference between those in church ministry and everyone else. But if religious work did absolutely nothing to earn favor with God, it could no longer be seen as superior to other forms of labor.
The gospel of salvation through sheer grace holds a second implication for work. While ancient monks may have sought salvation through religious works, many modern people seek a kind of salvation—self-esteem and self-worth—from career success. This leads us to seek only high-paying, high-status jobs, and to ‘worship’ them in perverse ways. But the gospel frees us from the relentless pressure of having to prove ourselves and secure our identity through work, for we are already proven and secure. It also frees us from a condescending attitude towards less sophisticated labor and from envy over more exalted work. All work now becomes a way to love the God who saved us freely; and by extension, a way to love our neighbor.
– Timothy Keller, Every Good Endeavor: Connecting Your Work To God’s Work