Paul shows us that we need to accept people as they are just as God does. As long as we don't violate God's Word we need to be careful to respect the beliefs and lifestyles of those outside the kingdom so we can have a chance to speak the Gospel to them.
In this passage Paul tackles the issue of paying a pastor. He reveals to us that Christ commanded that pastors/leaders of churches are to be paid.
In this passage we find that the Bible teaches there are things in life that are wrong for one Christian but not another.