It's not a sin to get discouraged, but it is a sin to stay discouraged.  Brokenness is not the final destination and loss is not the end.  Rather, they are the gateway to God's prophetic kingdom gain.  And when you feel as though the whole world has counted you out, encourage yourself in the Lord that God has not cast you out.  Join Pastor Greg Locke in 1 Samuel 30:1-19 as we discover, "God's gonna give it all back!"