He willingly gave us His life

²⁸Later, knowing that all was now completed, and so that the Scripture would be fulfilled, Jesus said, "I am thirsty." ²⁹A jar of wine vinegar was there, so they soaked a sponge in it, put the sponge on a stalk of the hyssop plant, and lifted it to Jesus' lips. ³⁰When he had received the drink, Jesus said, "It is finished." With that, he bowed his head and gave up his spirit.
John 19:28-30

Jesus voluntarily gave His life for us. He knew the pain and wrath that He had to endure by taking on our sins. He wasn't taken by surprise by anything that happened.
Jesus was not defeated by death, but He willingly gave up his spirit so that He can die for our sins.