He cares about our choice of career and how well we represent Him on the job. God is concerned about helping us to become better workers in all kinds of situations. Although those words primarily dealt with the way Timothy taught the truth of God's Word to people who were prone to wander into error, the principle applies to all types of work. We need to strive for excellence, no matter what our job. One reason is that what we are doing doesn't always seem to be all that important.
Work can be extremely stressful.
We long for some relief. We don't look forward to the first day of the work-week. We often see work as a necessary evil that must be endured until we can punch out and do what we really want to do. For many years I cleaned an office building in the evenings. That included emptying wastepaper baskets, vacuuming floors, mopping, dusting, and making sinks and toilets spotless.