To be seen, or not to be seen

Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven. - Matthew 5:16

Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in heaven. - Matthew 6:1

How do you reconcile those two statements? They seem to say "Do good so that people can see that you are good and then glorify God, but don't do good for the purpose of being seen."