Isaiah 43:25

'I, even I, am he who blots out your transgressions for my own sake' grounds the scribes' premise that God alone forgives sins. Jesus' pronouncement of forgiveness, and the controversy it provokes, presuppose this divine prerogative; strong coherence with the second-Isaiah claim that pardon is God's act.

The scribes' objection "Who can forgive sins but God alone?" (v.7) presupposes the prophetic axiom of Isa 43:25, "I, even I, am he who blots out your transgressions for my own sake." High volume on the distinctive theology that pardon of sin is God's sole prerogative; Mark stages Jesus' authority precisely against this exclusive divine claim. Recurrence is strong in Isaiah's forgiveness oracles (44:22).

'that your sins may be blotted out' (v. 19) echoes the LORD's promise 'I am he that blotteth out thy transgressions'; the blotting-out image of divine forgiveness is distinctive.

God 'wiping out the handwriting' and forgiving all trespasses echoes Isaiah's 'I, even I, am he who blots out your transgressions for my own sake,' the divine erasure of the record of sin. The blotting-out vocabulary and forgiveness theme give moderate volume and strong coherence.

'I, even I, am he who blots out your transgressions for my own sake.' The scribes' charge of blasphemy presupposes that only God forgives sins; Isaiah's first-person divine prerogative is the unstated premise Jesus claims, sharpening the christological provocation.

'I, even I, am he who blots out your transgressions for my own sake' grounds the forgiveness of sins as a divine prerogative now delegated to the disciples (20:23). Faint background highlighting that sin-forgiveness is God's act, sharpening the Christological claim.