In the 500 years since Martin Luther nailed the 95 Theses to the doors of the Castle Church in Wittenberg in 1517, we may tend to forget how difficult this was for him at the time. While he certainly grew in his stamina and resolve, on October 12, 1518 he wasn’t feeling that when he was grilled by Cardinal Thomas Cajetan in Augsburg, Germany. Luther would later write that he was so scared and nervous he could barely ride his horse because his intestines had not stopped “acting up” for days.