1:5By whom we have received grace and apostleship, for obedience to the faith among all nations, for his name:

6:17But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.

10:16But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?

10:17So then faith cometh by hearing, and hearing by the word of God.