Isaiah 6:9

And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not.

Hear ye indeed, but understand not - Hebrew, In hearing, hear; i:e., Though ye hear the prophet's warnings again and again, ye are doomed, because of your perverse will (), not to understand. Light enough is given in Revelation to guide those sincerely seeking to know, in order that they may do, God's will; darkness enough is left to confound the willfully blind (). So in Jesus' use of parables ().

See ye indeed - Hebrew, see in seeing; 'though ye see again and again' yet, etc.