Read: Luke 18:31-34
And taking the twelve, he said to them, "See, we are going up to Jerusalem, and everything that is written about the Son of Man by the prophets will be accomplished." (Luke 18:31 ESV)
The Old Testament is crammed full of prophetic predictions about the Messiah. The young Jewish prophet Daniel wrote of the Messiah, calling him the Son of Man—a phrase Jesus often used to refer to himself. Jesus knew the stories. He knew their original inspiration and he was the ultimate fulfillment. Everything written by all of God's prophets across the entirety of the scope of human history would become true.
Can you imagine the enormity of realizing that hundreds of predictions had been written about your life and death? It would be staggering to say the least. Jesus handled it, just as he handled everything else. He knew. He accepted. He embraced. And, he used it as a an opportunity to teach and train his disciples.
What if someone had written a book about your life hundreds of years before you were born? What if every facet, from birth to public life, came true? For Jesus it did. Everything written came to pass. The plan of God was written by men inspired by God. Then it was accomplished by God, all of it, everything written.