In preparation for reading Karl Barth I've decided to read about Karl Barth. Here is a little story told by Eberhard Busch that seems to capture something of the joy that Barth took from being a theologian.
When Barth was old, he always treasured conversations with small or large groups of people who wanted to discuss with him topics that were on their hearts. On one such occasion a lady asked him, "Herr Professor, can I be sure that I will see my loved ones in heaven?" He spontaneously replied, "To be sure, you will see not only your loved ones'!"