1 Peter 1:14

Verse 14 As obedient children, not fashioning yourselves.

Recognized as children that is, children and heirs as set forth in verse 4. And more than children obedient children; you must not fashion yourselves as you once did. You well remember that before you became children you followed a course of conduct and conversation fashioned after the world. The course then pursued by you was evil. Your present course must not be so fashioned, but fashioned after the teachings you now receive as obedient children.

In your ignorance.

Your course of evil, while you had no information of the demands of the divine Father upon the children of men, was the result of your ignorance; that is to say, you were ignorant of the divine requirements as to your course. Now, this can not be wholly applicable to a Jewish Christian. In his case he had knowledge of the one true and living God, and under the economy under which he was reared he learned that God required him to lead a holy life. Those commentators who claim that this Epistle was written to Jewish Christians only seem to have overlooked the plain teaching of this verse.