Chapter 4:23-25 Ministry in Galilee

4:23 And Jesus went about all Galilee, teaching in their synagogues, and preaching the gospel of the kingdom, and healing all manner of sickness and all manner of disease among the people.

And Jesus went about all Galilee - Having called four of His disciples, He took a tour throughout Galilee; a country mean and despicable, inhabited by persons poor, illiterate, vile, and wicked: such had the first fruits of Christ's ministry, and messages of His grace;
teaching in their synagogues, and preaching the Gospel of the kingdom - The places where He taught were "their synagogues": 

He did not creep into private houses, 

as the Pharisees then, and false apostles afterwards did; 

but He appeared openly, 

and declared his doctrine in places of public worship;

healing all manner of sickness, and all manner of disease among the people - It is in the Greek text, "every sickness and every disease"; that is, all sorts of maladies, disorders and distempers, which attend the bodies of men.

4:24 And His fame went throughout all Syria: and they brought unto Him all sick people that were taken with divers diseases and torments, and those which were possessed with devils, and those which were lunatick, and those that had the palsy; and He healed them.
And His fame went throughout all Syria - For His ministry and miracles, especially the latter; wherefore they brought to him, that is, out of Syria, the sick. Syria was in some respects reckoned as the land of Israel, though in others not.
He healed them; without any means, by a word speaking; which showed him more than a man, and truly and properly God.

Christ, by curing bodily diseases, intended to show, that His great errand into the world was to cure spiritual maladies. 

He is the Sun of righteousness, 

that arises with this healing under His wings.

4:25 And there followed Him great multitudes of people from Galilee, and from Decapolis, and from Jerusalem, and from Judaea, and from beyond Jordan.

And there followed Him great multitudes of people - Some on one account, and some on another; some out of good will, others out of ill will; some for the healing of their bodies, others for the good of their souls; some to see His miracles, others to hear His doctrine.