Relying on someone is really hard to me and that is why I can't say I have a true friend that would put him/herself in front of a bullet to save my skin when I need protection. Life became a huge battlefield due to a world full of greed and ignorance. Selfishness tends to close everyone into their nutshells they are so afraid to leave unless life demands it and when this demand has to do with themselves.
When the world turns into a more altruistic place, where people think about others and about their needs more often, there will be a way to make one or two true friends. But I still believe in mankind!
I agree with that quote, but I do want to add something to it. I'd like my friends to tell me when I'm getting into trouble that it's my own fault, and support me in fixing whatever has been done. Sometimes the trouble can't be wiped away, but it can be moved on from.
Based on that: Wiping your [crap] instead of giving you [crap], then yes, I have a true friend.
Met him in highschool and now that we both have our own family and teenage kids, we're still close. Of course if what I'm doing is wrong, he would tell me but he would still help me get out of trouble. Would he be consenting participant to my mischief, yes probably. But still, I'm sure he has my back if ever [crap] hits the fan.