Gospel: Matthew 16: 13-20
In the Gospels there is a measuring stick that identifies the extent to which a person understands who Jesus is. It is expressed in a variety of titles people give to Jesus: sir, rabbi, prophet, Messiah, Son of God/Savior of the world. In today's account, the disciples relate what people say about Jesus, all of which see him as a prophet. When Jesus asks them who they say Jesus is, Peter steps up to use the titles of Messiah and Son of God, for which Jesus praises the answer.
Yet two verses later Peter will be rebuked for really not knowing what those titles meant, for he saw them in political/military terms and not in the Suffering Messiah. But in many ways Peter's answer to the question of who Jesus is misses the point, for the answer is found in the question itself - who am I. The answer is "I am." Jesus is the presence of God on earth, God who is with us in our hopes and fears, our joys and sorrows. And that presence is all we need in our lives.
When Jesus asks us who we say he is, he is not looking for a theologically precise definition from Chalcedon or 20th century Christology. The question is not a catechism quiz. It is a personal, spiritual, mystical one. The answer is simply the one Jesus gives at his arrest - I am - for he is simply God's presence among us, the one who is with us in our celebrations and in our mourning. God is not a warrior, king, or emperor. God is simply the one who shows up and is present to us at all moments of our life.