Trivializing

"Now, why are these verses [Isaiah 1:29-31] so confrontational? You can ask that question of so many passages in the Bible, especially in the prophets. Why are these verses so confrontational? God is pressing his point because we trivialize ourselves. God takes us more seriously than we take ourselves." (Ray Ortlund, 31:56 in the audio of his August 25, 2002 sermon here)