They were astonished at His teaching, because His message had authority.
When Christ was expelled Nazareth, he came to Capernaum, another city of Galilee. The account we have in these verses of his preaching and miracles there we had before, Mar 1:21, etc. Observe, I. His preaching: He taught them on the sabbath days, Luk 4:31. In hearing the word preached, as an ordinance of God, we worship God, and it is a proper work for sabbath days.
Commenting on Luke 4:31-44
And they were astonished at his doctrine,.... At the matter of it, as well as the manner in which it was delivered, it being so different from the Scribes and Pharisees, they had been used to: for his word was with power: he spake with great fervency, majesty, and authority, and not with coldness and indifference, and dependence on the sense and authority of others...
Verse 32. No entry from BARNES for this verse. (a) "for his word"