Titus 2:9-10

Slavery in the Bible is a hot-button topic...with good reason. The issue, though obviously touchy, is nevertheless mentioned in this chapter. So, what can we learn. First, this passage does not condone or promote slavery--it simply acknowledges it. At the time this book was written some believers were slaves. Now, I doubt anyone who reads this today is a slave, but there are certainly still lessons for us.

This passage says that a slave should be a hard worker, obedient, and not argumentative. They should not be thieves, and should work hard so that their actions reflect well on their LORD. 

Ultimately, in that culture some people sold themselves into slavery as a form of job security. You could indenture yourself to someone to ensure that you would have lodging, food, shelter, etc. Others were sold into slavery to pay off a debt. However it was that you came to be in that situation you were taught to work hard and be a good example.
In today's American economy we do not have slavery, but there are plenty of people working jobs which are not their first choice. Not many people can say, "If I could have any job on the world, this is it." Yet, we have an opportunity to shine like a light in a dark room. You are where you are for a reason--use it for God's glory. 
Our situation and circumstances are rarely of our choosing, but our responses always are. 
Titus 2:9-10   9 Slaves are to be submissive to their own masters in everything; they are to be well-pleasing, not argumentative,  10 not pilfering, but showing all good faith, so that in everything they may adorn the doctrine of God our Savior.