Yes, but Gau doesn't really know what he's missing...right? He met his father, but didn't know him most of his life. That's not really tragic if you ask me.
Then again, the poor kid wound up like a wild animal...but hell, at least he got his oats...
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Fight, if there is something to fight for.
Never give in, or give up - but ALWAYS give.
Choose your battles wisely.
You only get one shot at life. Follow your heart.