God's people must be honest in our business dealings. We should never be those who cheat or swindle others out of what is due to them. As believers, we shouldn't always be the ones looking for a "hook up", because we understand that a workman is worthy of his wages. We should be those who tip generously, even when service isn't necessarily flawless, because we understand grace and mercy. We are those who offer the "best deals" to others, whenever possible, because we value service above self gain and esteem others greater than ourselves. The measure of a man's heart can often be determined through his business practices.
When we truly have the heart of God, it extends beyond ministry. Selah.