How many of us remember our classes from Middle School? How many of us remember saying about at least one class, "I will never use this in real life!" How many of us were surprised to find that we have, in fact, used something from this class in real life? In the same way that we used the lessons learned in that class, we will also use the lessons that we learn in our spiritual walk with Christ.
We are told in the apostle John's second epistle that we should remain in the teaching of Christ. We should strive to retain what we have been taught about Christ. There are many in the world who have chosen not to retain what they have been taught about Christ. These people do not have the Father or the Son.
We, however, have both the Father and the Son, if we remain in the teaching of Christ. We must not only read about Him. We must consciously apply His teaching to our lives. Many of those without Christ have no problem reading about Him and His teaching. The biggest problem comes with applying these teachings to our lives. Very few people would argue against loving our neighbor, yet most of us have failed at this at one time or another. If we are to grow in our walk with Christ, we must learn to apply His teachings, rather than merely reading about them.