A man named Fock was a sailor in World War II. In one of his letters home he wrote, "If you should hear that I have fallen in battle, do not cry. Remember that even the ocean in which my body sinks is only a pool in my Savior's hand." There is no promise that we'll be delivered from trouble; but there is a promise that we are not alone in it. I think that's why Jesus could say, "Be not afraid." He knew he was not alone.