Although much attention has been given to the structure and meaning of Mark 11–12, the chiastic structures in that passage have not been sufficiently observed nor appreciated for their contribution to the Markan message. The grave mistake and failure of the Sadducees in 12:18- 27, and of the religious establishment in the larger context of chs. 11–12, was that of being deluded in their interpretation of Scripture. This might not seem clear at first to modern readers , but once the chiasms, ergasia chreia elaboration, and contextual evidences are shown and explained, the purposeful use of these rhetorical structures in the text becomes more apparent and prompts a reconsideration of the importance of chiasms in the Second Gospel.