In the Pantheon of Things That Kids Hate Hearing, "you'll understand when you're older" is right up there with "we have food at home" and "get off my lawn, sonny!" (Kids hate clichés.) But in growing up, you begin to experience something from the Pantheon of Thoughts That Adults Hate Having: "Oh my god, my parents were right about this."
So I want to hear from you: What piece of advice or general truism about life did your parents or guardians give you when you were a kid that you didn't think was accurate...until you became an adult?
Maybe it was something minor and low stakes and related to the trends of your day, like your parent delicately asking, "Are you sure you want feather hair extensions?"
Perhaps it was related to school, work, or the Internet. It could've been the perennial classic, "Hey, maybe don't post that online, because your digital footprint is permanent in a way you might not understand yet."
It could be that the advice was more philosophical than practical, more "comparison is the thief of joy" and less "keep up with your dentist and eye doctor appointments, for the love of God."
Whatever it is, we want to hear about it. Tell us about the advice and what made you start believing in it in the comments for the chance to be featured in an upcoming BuzzFeed Community post.