If all else fails in the fundy plight to socialize people into mimicking the acceptable “standards” of behavior, playing the maturity card is the last resort.
“Oh, you just don’t understand how important this is because you’re only a baby Christian. I know you’re 53 and have children older than I am (after all I’m only 26 and just got my Bible degree) but if you’ll just do what I tell you then soon you’ll be a grown-up Christian like I am…”