The Messiah would teach in parables.
OT Prophecy NT Fulfillment
Isaiah 6:9-10b
"[9] And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not. [10] Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, and be healed."
Matthew 13:13-15
"[13] Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand. [14] And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive: [15] For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them."

Tanakh - Neviim - Isaiah 6:9-10b

"[9] And He said: Go, and tell this people: hear ye indeed, but understand not; and see ye indeed, but perceive not. [10] Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they, seeing with their eyes, and hearing with their ears, and understanding with their heart, return, and be healed."

 Hebrew OT - Isaiah 6:9-10b

וארו וניבת-לאו עומש ועמש הזה םעל תרמאו ךל רמאיו    [9]
.ועדת-לאו ואר       
עשה ויניעו דבכה וינזאו הזה םעה-בל ןמשה  
10]
בשו ןיבי ובבלו עמשי וינזאבו ויניעב הארי-ןפ       
.ול אפרו
      

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