It’s easy to look at someone in a ministry position, like pastor or missionary, and say, “They are doing the work of God.” But, frankly, most people aren’t in one of those ministry positions. Most people are short order cooks, farmers, daycare workers, carpenters, teachers, mechanics, retail employees, factory workers, etc. And when you’re working one of those jobs you may wonder, "What does this have to do with the kingdom of God?." I would suggest that it has a lot to do with it.
God has given you abilities to use for His glory and honor. 1 Corinthians 10:31 says, "So, whether you eat or drink, or whatever you do, do all for the glory of God." God didn’t say this just to pastors and missionaries, but to everyone who is a follower of Christ. We do our work, not to bring glory to ourselves, but to bring glory to the God who gives us the ability to do that work.