Isaiah 6:9-10

9The Lord said, ‘Go! Tell my message to those people: “You will continue to listen, but you will never understand! You will continue to look, but you will not see anything!”

10Make them refuse to understand. Cause their ears to be deaf and their eyes to be blind. If you do not do that, they might use their eyes to see. They might use their ears to listen. They might use their minds to understand. Then they might turn back to me so that I would make them well again.’