John Chrysostom approached theology chiefly as a preacher and pastor. He taught that the Gospel calls believers to repentance, prayer, humility, generosity, and a transformed daily life. His homilies repeatedly warned that public worship means little when Christians neglect their neighbors. Wealth was a trust to be used responsibly, and failure to assist the poor was a grave moral concern.
He emphasized both God's initiative and the responsibility of human beings to respond. His sermons urged hearers not to despair after sin but to repent, practice virtue, and rely upon divine mercy. His ascetic ideals were demanding, yet he also addressed the responsibilities of married people, parents, officials, and ordinary workers.
His pastoral teaching frequently returned to the dangers of anger, vanity, luxury, and misuse of power. He regarded the care of the vulnerable as a necessary expression of faith, not an optional accomplishment for unusually devout Christians.