I would always encourage people of any age not to be so quick to follow other people's truths but to search and follow your own moral code and live by your own integrity and mostly just be brave.
Most of the basic material a writer works with is acquired before the age of fifteen.
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I don't believe in happy endings but I do believe in happy travels because ultimately you die at a very young age or you live long enough to watch your friends die. It's a mean thing life.