False prophets "walk according to the flesh"; their minds are primarily on physical things rather than the true things of God. God is not in all their thoughts (Psalm 10:4). They also despise authority—other than their own—and apparently think themselves superior even to God's angels. They are presumptuous and self-willed, acting out of the dictates of their own hearts (or the influence of a demon) rather than following God with humility and trusting Him to bring His will to pass.