“And he preached in their synagogues throughout all Galilee, and cast out devils.”
Mark 1:39 — Greek Interlinear
Church Fathers on Mark 1:39
After that the Lord had cured the sick, He retired apart.
But by this preaching, which, he says, 'He continued in all Galilee,' is also meant the sermon of the Lord delivered on the mount, which Matthew mentions, and Mark has entirely passed over, without giving any thing like it, save that he has repeated some sentences not in continuous order, but in scattered places, spoken by the Lord at other times.
Again, mystically if by the setting of the sun, the death of the Saviour is intended, why should not His resurrection be intended by the returning dawn? For by its clear light, He went far into the wilderness of the Gentiles, and there continued praying in the person of His faithful disciples, for He aroused their hearts by the grace of the Holy Spirit to the virtue of prayer.