Paul was driven to grow closer to Christ. In I Corinthians 3, we're told that our works will be made manifest. In other words, everything we've done will be turned inside out so that we can see the motives behind them. Even an endeavor as lofty as preaching will be scrutinized. Sermons will be burned in the fire if they were designed to deliver pats on the back rather than deliver glory to God.
Works are important, but only if they are motivated by the quest to deepen our faith.
Yes, you do. You have more than enough. Jesus told us that faith no bigger than a mustard seed could move a mountain. Obviously, the question has nothing to do with the amount of faith we possess. Instead, the issue is the object of our faith.