Usually, on the last two days, at least I come in on koans. But that what we're going to hear today is so it's so nuts and bolts spot on for this stage this, this late session that I had to read from Matt. But first, he speaks to exactly what we see in the three pillars of Zen. And but the three, rubber, three prerequisites or three elements of serious Zen practice koan practice, at least in the three pillars, it's faith, doubt and determination here. He says faith, courage and faith, doubt and courage, but I'll let him speak. There are three essential elements of koan meditation, great faith, great courage, and great questioning. First, there's faith. This is not the faith of believing in the Buddha. But the faith you have in yourself,