It is through the common activities of daily life that God establishes his uncommon kingdom. God's kingdom may not be of this world, but it is certainly meant to come into this world, and it does so in rather ordinary ways. Whenever you calculate the accounts payable, double-check a lab result, haul away the trash, serve a hot meal to the homeless, finish your history homework, help a customer find the right size, water the geraniums, or snap the lid on a sippy-cup, you are doing kingdom work. You are doing kingdom work provided, that is, you do whatever you do in submission to God's rule, for the sake of His royal honor. You are doing kingdom work, not because doing these things will necessarily change the world, but because by doing them, you show how God has changed you.

Philip Ryken, When You Pray: Making the Lord's Prayer Your Own