Many people misunderstand the nature of faith. If you’re a Protestant you’ve probably heard many times that salvation comes through faith, and not through works. In other words, the good or bad deeds which you do in life are irrelevant to the question of whether you get into heaven. The only way to get in is by believing in Jesus.
So a lot of people form the view that your knowledge is more important than your actions. They think that being a Christian is about believing the correct doctrines, rather than doing the correct activities. In other words, it’s all in your head. If you haven’t studied enough theology and absorbed enough teachings, then you might miss out.
In reality, faith isn’t just something you think. It’s something you experience. You only really get to trust in God when you rely on him to do something that he’s promised, something that couldn’t happen if he didn’t make it happen. If you never step out and take risks in doing God’s work, you never get to discover what God can do when you’re actively putting your faith in him.