our parents
»The fuck you up, your mom and dad
They may not mean to, but they do.
They fill you with the faults they had
And add some extra, just for you.« - Philip Larkin This be the Verse
And that's not a criticism of parents, but I think it says there's something inevitable about it. Your parents want you to know things that they've learned, but they can only do so much. You've pretty much got to learn it yourself.

Found in the sad and beautiful book »The Chris Farley Show« (Chris Farley at IMDB).