Faith is like a muscle; opposition may strain it, but in the end it grows stronger. The Psalmist David understood this principle. He was continually hounded by his enemies. Even when he was being anointed to sit on the throne, Saul, the old king, was still occupying it. But instead of losing faith in God's promise, David understood that "the Lord has set apart the godly man for Himself" (Ps. 4:3 NAS). When the Philistines captured him he prayed, "When I am afraid, I will trust in You" (Ps. 56:3).
Jesus said you'd have problems on earth; people will disappoint you, and you'll disappoint yourself. Sometimes you'll end up in trouble because of something you did, and other times because of circumstances you have no control over. But God is with you either way. And like Paul said, "WIth God on our side..how can we lose?"