Markus 2:5

2:5 When Jesus saw their ¹  faith, he said to the paralytic, “Son, your sins are forgiven.” ² 

Markus 2:7

2:7 “Why does this man speak this way? He is blaspheming! ³  Who can forgive sins but God alone?”

[2:5]  ¹ sn The plural pronoun their makes it clear that Jesus was responding to the faith of the entire group, not just the paralyzed man.

[2:5]  ² sn The passive voice here is a divine passive (ExSyn 437). It is clear that God does the forgiving.

[2:7]  ³ sn Blaspheming meant to say something that dishonored God. To claim divine prerogatives or claim to speak for God when one really does not would be such an act of offense. The remark raised directly the issue of the nature of Jesus’ ministry.