From then on Jesus began to tell his disciples plainly that it was necessary for him to go to Jerusalem, and that he would suffer many terrible things at the hands of the elders, the leading priests, and the teachers of religious law. He would be killed, but on the third day he would be raised from the dead.
References for Matthew 16:21
But Peter took him aside and began to reprimand him for saying such things. “Heaven forbid, Lord,” he said. “This will never happen to you!”
References for Matthew 16:22
Jesus turned to Peter and said, “Get away from me, Satan! You are a dangerous trap to me. You are seeing things merely from a human point of view, not from God’s.”
Then Jesus said to his disciples, “If any of you wants to be my follower, you must turn from your selfish ways, take up your cross, and follow me.
If you try to hang on to your life, you will lose it. But if you give up your life for my sake, you will save it.
And what do you benefit if you gain the whole world but lose your own soul? Is anything worth more than your soul?
References for Matthew 16:26
For the Son of Man will come with his angels in the glory of his Father and will judge all people according to their deeds.
And I tell you the truth, some standing here right now will not die before they see the Son of Man coming in his Kingdom.”