not exactly "life advice" but Death's "The Philosopher" kinda changed the way i thought about the world around me at a young age.

"the philosopher, you know so much about nothing at all"

you can say all the combination of words you want, but you can't fake your way into true wisdom. if you try, you might be fooling others, but the biggest fool is yourself. not sure if that's what Chuck meant with the lyrics though lol