The problem that we are facing in the church today is that we have so many Christians who have made a decision to believe in Jesus but not a commitment to follow Him. We have people who are planning to, meaning to, trying to, wanting to, going to, we just don't have people who are doing it.
God doesn't expect us to be a walking encyclopedia of biblical knowledge. He wants us to know Him, to be in a relationship with Him. This means not only hearing but allowing our understanding of God to change the way we live. Like the wise builder who laid the foundation of his house on the rock, we learn to let our knowledge of God change us.