"Profitable" means that its use can profit its reader for certain things. "Doctrine" is the Greek ''diaskalia'', teaching. "Reproof" means telling someone that he is wrong, while "correction" means setting the person on a straight path. Finally, "righteousness" does not mean "acting in a just manner" but rather "how to be sure that God has justified you," because no person can justify himself.<ref>{{Bible ref|book=Romans|chap=3|verses=10}}</ref> | "Profitable" means that its use can profit its reader for certain things. "Doctrine" is the Greek ''diaskalia'', teaching. "Reproof" means telling someone that he is wrong, while "correction" means setting the person on a straight path. Finally, "righteousness" does not mean "acting in a just manner" but rather "how to be sure that God has justified you," because no person can justify himself.<ref>{{Bible ref|book=Romans|chap=3|verses=10}}</ref> |