We don't know how to do it, or what to do, but God comes and shows us the way. Satan does a lot just to discourage the Christian. Satan always tries to make you reason, how can you believe in what you don't see? "But as it is written, "These are things which eye has not seen, nor ear heard, nor have they entered into the heart of man, things which God has prepared for those who love him. (1 Corinthians 2:9) We are certain of what God has given us. That is the difference with Satan. Satan cannot have what we have: God has given you faith, that is, to believe in the impossible. That is your strength, your victory.