Our worldly successes cannot be guaranteed but our ability to achieve spiritual success is entirely up to us thanks to the grace of God. The best advice I know is to give is to give those worldly things your best but never your all - reserve the ultimate hope for the only one who can grant it.
Guantanamo allows us to secure dangerous detainees without the risk of escape while at the same time providing us with valuable intelligence information on how best to proceed in the war against terror and prevent future attacks.