Sin, many of us believe, is doing what our mothers tell us not to do. Sin is what those TV preachers talk about on Sunday mornings.
Sin is the subplot of our favorite soap opera.
While these may be good examples of sin, our overall definition of sin is often cartoonish and one-dimensional. He asked one of his students to choose which are the worst two sins in the Torah. The student thought for a while, and gave an answer. Rav Hutner rejected the answer, and the student thought about the question again and came back with a different answer. Again, Rav Hutner rejected the answer.