One day when my son was home during his medical training, we had a conversation about his work. I said to him, "In medicine you have found what you want to do. You are going to give your life to it, and you will love it. But you must be careful. The first thing you know, you will wake up and be fifty years old, and the only thing you will have between your ears will be human anatomy and how to cut into it. That is a pretty thin ration on which to live intellectually, emotionally, and spiritually. You need to start forcing yourself every day to read something that is not medical so that when you are fifty, you will be a human person as well as a surgeon.
(from Feb 13, This Day with the Master devotional book, Zondervan)