The one who revealed it
Scripture · as God’s word
When Peter made his confession, Jesus told him that the answer had not come from his own study or intuition: the Father in heaven had made it known to him.
The five rings of this guide are what ‘flesh and blood’ can do: human inquiry. Inquiry can bring you as far as the empty tomb. But it is God who brings a person to confess Jesus as the Christ, the Son of the living God. That is why faith is a gift (Ephesians 2:8–9).
And from that time on, Jesus began to teach that he must suffer in Jerusalem, be killed, and be raised on the third day (v. 21). The confession of the Christ leads on to the way of the cross and the resurrection.
Yet this is not a question that ends in curiosity, because the answer is a matter of life.