What is the most valuable thing you have learned in life??e?

No. Whatever it was, I'm pretty sure that it wasn't e.

You either die a hero, or live long egnough to see yourself become a villain.

Probably algebra and inequalities. I would be failing if I did not know them lol.

never to trust my parents with promises like being nice

The most valuable thing I learnt is that "Nothing is either good or bad, but thinking makes it so" ~ Shakespeare
In fact, the quote has left a strong impact on me.

@FishNotADish2
Or, neither you don't become hero nor a villain and have a simple life!

@Akbar2thegreat
Classic viliian move. THey think They are doing nothing wrong or is doing something good.