Some have argued that since Mark begins his story here, at the baptism, that this could be seen as a form of adoption, as it is God's action which changed Jesus' life, although Mark probably is confirming their preexistent relationship. Jesus is never declared as God's adopted son anywhere in the book, but Mark does not exactly state how or when Jesus became God's son. Both Matthew and Luke use their infancy narratives to show that Jesus was God's son from the moment of conception, and has him as the word of God from the moment of creation.