In Exodus 33 and 34, Moses says, “Show me your glory” (which is the title of a book I have coming out). Then, God descends in a cloud, and God Himself preaches to Moses. He preaches His own glory to Moses. He says: “I will have mercy upon whom I will have mercy, and I will have compassion on whom I have compassion” (Ex. 33:18–19). God Himself preaches sovereign grace to Moses, who desires to see His glory.
Even having said that, just give me the book of Psalms, and I can put together an airtight case for the doctrines of grace. Give me the book of Isaiah, and I’ll give you an airtight case on the doctrines of grace. We can virtually go book-by-book and compile a miniature systematic theology on the doctrines of grace. But give me Psalms or give me Isaiah, and it’s a slam-dunk.