Charles Ellicott Commentary Luke 4:32

"and they were astonished at his teaching; for his word was with authority." — Luke 4:32 (ASV)

At his doctrine.—Better, His teaching, as elsewhere. The form and manner were what amazed people.

His word was with power.—The word used is the same as the “authority” of Matthew 7:29. There were no timid references to the traditions of the elders or the dictum of this or that scribe, such as they were familiar with in the sermons they commonly heard in their synagogues.