What do you wish you had known when you were young so that you could have lived your life differently?
A Reddit user has asked people to reveal the best life lesson they learned too late - and hundreds of people have come forward and contributed to the thread.
Answers include everything from knowing the difference between being a nice person and a doormat - to the fact that sometimes bad things happen for absolutely no reason.
The majority of answers from Redditors were serious as they offered advice to both their younger selves and others who might be younger and reading the thread.
Some said that it took them a long time to learn that you shouldn't compare yourself to others all of the time - because you're always going to be disappointed.