Of all liars the most arrogant are biographers: those who would have us believe, having surveyed a few boxes full of letters, diaries, bank statements and photographs, that they can play at the recording angel and tell the whole truth about another human life.
I think it's easiest to teach by example. My dad didn't tell us to work hard we just saw how hard he worked. I know I have shortcomings - like a short fuse - but I've learned you can't come home from a long day of work and snap at the kids.
Question with boldness even the existence of a God because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear.