I recently saw a poster advocating the vaccination of parents as a reasonable means of protecting children. Fair enough: if the parents are immune to that particular virus, then they probably won't pass the virus onto their kids. There can be other pathways to infection, but at least that from the parents is eliminated.
Are viruses the only things that parents need to worry about? What about bad habits? Crass language? Being lazy? Gossiping? Questionable fashion tastes?? Oh but there is so much more that can seem harmless enough at first glance. What are mom and dad's favorite TV shows? What do they really think about this or that issue? What is their attitude towards this or that ethnic group? Do we drive safely and legally?
And what about faith and morals?
It was only in becoming a father that I was truly challenged to be a disciple of Christ. If I want that of them, then I must be a good one myself. If I am truly convinced that Christ is the Way, Truth and Life, then I should want that of them.