I never cheated in school. I was always too afraid. Afraid of a big scarlet "F" on top my paper. Afraid of an ominous visit to the principal’s office. Afraid of the terrible consequences listed in the class syllabus. But lately I'm learning that plagiarism isn't confined to the English classroom or the inventor’s office—it threatens our spiritual life too. In his book Prayer, Tim Keller summarizes the essence of sin as failing to glorify and thank God (Romans 1:18-21). He explains: Think about plagiarism for a moment. Why is plagiarism taken so seriously? It is claiming that you came up with an idea yourself when you did not. It…