Pastor Zac Nazarian - To Know and Obey - Matthew 25:1–30 Although the Bible teaches us how to be good, its main purpose is to demonstrate that we can never be good emough–which is why we need a savior. Yet, when we read it we often, like Jonah, create a God of our own understanding and are not therefore devoted to God as He reveals Himself in Scripture: The God of unrelenting mercy and grace.