John Calvin Commentary Mark 1:27

"And they were all amazed, insomuch that they questioned among themselves, saying, What is this? a new teaching! with authority he commandeth even the unclean spirits, and they obey him." — Mark 1:27 (ASV)

What new doctrine is this? They call it new doctrine, not as a reproach, but as an acknowledgment that there was something unusual and extraordinary in it. It is not to blame it, or to diminish its credibility, that they speak of it as new. Instead, this is part of their admiration: they declare it to be uncommon or extraordinary. Their only fault lies in this: they remain in their state of hesitation,³⁴⁶ while the children of God ought to make increasing progress.

³⁴⁶ “En leur doute et estonnement.” — “In their doubt and astonishment.”.” — “In their doubt and astonishment.”