A football quarterback can memorize all the rules of the game and all the possible plays, but that does not make him a quarterback. He learns by playing the game. As you start living the Christian life, you understand more and more about it as the days go by. Jesus said that we learn the life by living it. If anyone chooses to do God's will, he will find out whether my teaching comes from God or whether I speak on my own.
Faith grows out of our choice.
We choose Jesus and then the light goes on. The words Jesus speaks begin to make great sense to us because we hear them as truth and life. Familiarity keeps many people from Jesus, don't let it keep you from Him. When sin quenches your faith and puts distance between you and God, confess your sin and return to your Saviour. Don't reject Jesus' true identify, accept that Jesus is who He says He is.