When I decided to begin a sermon series in the book of Isaiah, I knew that my church and I were embarking on a trek through a sometimes-dense forest of difficult-to-understand Old Testament prophecy. Sure, I had a reasonable familiarity with Isaiah from my own previous reading and study of the book. I suspected that we would behold God in his august glory in that vivid manner in which one finds in Isaiah. But I did not plan on Isaiah causing me to be undone by turning the spotlight on the rebellious disobedience of God’s people, and I did not realize I would receive the incredible gift of seeing my own sin.