Matthew 4:22 - Albert Barnes' Notes on the Bible

Left their father - This showed how willing they were to follow Jesus. They showed us what we ought to do. If necessary, we should leave father, and mother, and every friend, Luke 14:26. If they will go with us, and be Christians, it is well; if not, yet they should not hinder us. We should be the followers of Jesus. And, while in doing it we should treat our friends kindly and tenderly, yet we ought at all hazards to obey God, and do our duty to him. We may add that many, very many children, since Sunday schools have commenced, have been the means of their parents’ conversion. Many children have spoken to their parents, or read the Bible to them, or other books, and prayed for them, and God has blessed them and converted them. Every child in a Sunday school ought to be a Christian; and then should strive and pray that God would convert his parents, and make them Christians too. We see here, too, what humble instruments God makes use of to convert people. He chose fishermen to convert the world. He chooses the foolish to confound the wise. And it shows that religion is true, and is the power of God, when he makes use of such instruments to change the hearts of people and save their souls. See the notes at 1 Corinthians 1:26-28.