Cyril of Alexandria

For although He knew that they were disobedient and hard of heart, He nevertheless visits them, as a good Physician tries to heal those who are suffering from a mortal disease. But He taught them boldly in the synagogues, as Esaias saith, I have not spoken in secret, in a dark place of the earth. (Isa. 45:19.) On the sabbath day also He disputed with them, because they were at leisure. …

Catena Aurea by Aquinas ↗

Ambrose of Milan

He describes the works of divine healing begun on the sabbath day, to show from the outset that the new creation began where the old creation ceased. He showed us that the Son of God is not under the law but above the law, and that the law will not be destroyed but fulfilled. For the world was not made through the law but by the Word, as we read: "By the Word of the Lord were the heavens established." Thus the law is not destroyed but fulfilled, so that the renewal of humankind, already in error, may occur. …

Commentary on Luke ↗

Bede

And he went down to Capernaum, a city of Galilee, and taught them on the Sabbath. Behold the mercy of the Lord the Savior: neither moved by indignation, nor offended by wickedness, nor violated by injury, he does not abandon Judea; rather, forgetting the injury, but mindful of mercy, sometimes teaching, sometimes liberating, sometimes healing, he soothes the hearts of the faithful people. …

On the Gospel of Luke ↗

Bonaventure

After he showed the doctrine of Christ to be authentic from the merit of his life and the testimony of Scripture, here he now shows it from a miracle of power, so that in the mouth of three witnesses the firm testimony of authority may stand. This part has three sections. In the first is set forth the communication of Christ's doctrine; in the second, the confirmation by the power of a miracle; in the third, the acceptance of the same by the multitude of the people. …

Commentary on Luke, Chapter 4 ↗