This essay assesses Maurice Casey's critique of work on Mk 14.61-62 found in my Blasphemy and Exaltation in Judaism. The article examines again and brings more detailed argument for the authenticity of these verses as well as questioning elements of his critique. The Jewish background fits the trial setting in a way that is unlikely to reflect an early church creation for a Gentile audience (i.e. Mark did not create this material). The essay also shows how solemn this exchange was once it is seen in light of this back ground. An array of Jewish texts illumine the expressions of the 'Blessed One' and 'the Power'. A positive assessment of this passage's authenticity is significant for historical Jesus studies.