For Christian faith not to be idle in the world, the work of doctors and garbage collectors, business executives and artists, stay-at-home moms or dads and scientists needs to be inserted into God's story with the world. That story needs to provide the most basic rules by which the game in all these spheres is played.
Rules help govern and steer a relationship along, so they're good things. But they become bad things when they become the narrow gate though which the relationship must always pass. When this happens, the rules become the basis for the relationship and, in a sense, become a substitute for the relationship.