Romans 1:14

I am debtor both to the Greeks and to Barbarians, both to the wise and to the foolish.

In this verse appears that dual classification of all people which was so fashionable in the world of that era. The Hebrews classified all people as Jews and Gentiles; the Romans classified the whole world as Romans and pagans; the Greeks included everyone as Greeks or Barbarians. There were other dual classifications such as wise and foolish, male and female, freemen and slaves, etc. Actually in usage, such classifications really mean "us and everybody else"! Paul's evident meaning is simply that he felt indebted to all people. Nothing that any man had done had laid this burden of debt upon Paul's heart; but it was what Christ had done for Paul which had made him debtor to all people of all races and nations. Christ had died for Paul, appeared to him, commissioned him as an apostle, saved his soul from sin, and made him an heir of everlasting life. Such a mighty weight of blessing had produced Paul's feeling of indebtedness, and where is the Christian who does not feel a similar debt, a debt of such weight and nature that the uttermost limits of one's ability, resources, and time may be taxed without fully discharging it? This immense and overwhelming debt may, in the last analysis, be relaxed only by the grace of God, as in a court of last resort; because, when Christians have done everything possible for them to do, such payments on their part can never fully discharge such a debt as this.