In today's gospel, Jesus tells us we are his friends because he has made known to us everything he has learnt from his Father. This begs the question; why then, do we not know these things?
Fr Francis Martin, in his study on John's gospel (talk 37B) tells us it is because we do not listen. He says that if we meet a friend and have a chat we listen intently to what they say to us and we spend time with them learning about them. It should be the same with Jesus. We should spend time with him in prayer and learn what he has to tell us. Fr Francis tells us the promise is there so why not hold Jesus to his promise. An interesting way of looking at this piece of scripture!