{Art thou the Son of God?} (Su oun ei ho huios tou
theou;). Note how these three epithets are used as practical
equivalents. They ask about "the Messiah." Jesus affirms that he
is the Son of Man and will sit at the right hand of the power of
God. They take this to be a claim to be the Son of God (both
humanity and deity). Jesus accepts the challenge and admits that
he claims to be all three (Messiah, the Son of man, the Son of
God). {Ye say} (Humeis legete). Just a Greek idiom for "Yes"
(compare "I am" in  Mr 14:62  with "Thou has said" in  Mt
26:64 ).