What does the term 'debtor' mean in the context of Paul's ministry?

In Romans 1:14, Paul declares, 'I am a debtor both to the Greeks, and to the barbarians; both to the wise, and to the unwise.' This concept of being a debtor illustrates the profound sense of responsibility he felt toward sharing the gospel with every group of people. Paul acknowledges that the grace he received compels him to extend this grace to others. His understanding of his debt is rooted in the fact that he strives to repay the life-changing gift of grace through his ministry, making the message of Christ accessible to all.