Markus 2:7

2:7 “Why does this man speak this way? He is blaspheming! ¹  Who can forgive sins but God alone?”

Markus 3:29

3:29 But whoever blasphemes against the Holy Spirit will never be forgiven, but is guilty of an eternal sin” ² 

Markus 12:23

12:23 In the resurrection, when they rise again, ³  whose wife will she be? For all seven had married her.” ⁴ 

[2:7]  ¹ 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.

[3:29]  ² sn Is guilty of an eternal sin. This passage has troubled many people, who have wondered whether or not they have committed this eternal sin. Three things must be kept in mind: (1) the nature of the sin is to ascribe what is the obvious work of the Holy Spirit (e.g., releasing people from Satan’s power) to Satan himself; (2) it is not simply a momentary doubt or sinful attitude, but is indeed a settled condition which opposes the Spirit’s work, as typified by the religious leaders who opposed Jesus; and (3) a person who is concerned about it has probably never committed this sin, for those who commit it here (i.e., the religious leaders) are not in the least concerned about Jesus’ warning. On this last point see W. W. Wessel, “Mark,” EBC 8:645-46.

[12:23]  ³ tc The words “when they rise again” are missing from several important witnesses (א B C D L W Δ Ψ 33 579 892 2427 pc c r¹ k sy^p co). They are included in A Θ Ë^1,(13) Ï lat sy^s,h. The strong external pedigree of the shorter reading gives one pause. Nevertheless, the Alexandrian and other mss most likely dropped the words from the text either to conform the wording to the parallel in Matt 22:28 or because “when they rise again” was redundant. But the inclusion of these words is thoroughly compatible with Mark’s usually pleonastic style (see TCGNT 93), and therefore most probably authentic to Mark’s Gospel.

[12:23]  ⁴ tn Grk “For the seven had her as wife.”