What is the most important/significant thing your friend/s ever said or told you?

Question

It has been said that, 'friends are the families we choose for ourselves' So we all have friends, some closer than others, some we can tell things to that we wouldn't necessarily tell our families.
What is the single most striking thing a friend ever said or told?

Answer 1

I was told, "Don't believe ANYTHING you hear, and only HALF of what you see."

That's slowly proven to be true over the years.

Answer 2

That "if you don't like something enough, you'll change it"

Answer 3

its not what was said, its what was done that was so amazing