This was something that came out of nowhere. It was inspired by something, but I don't quite remember what.
Duality
Shinobi had no flaws. They had ambition and the strength and talent to get there. Their destinies, they carved out with their bare hands. Their toil would not go to waste, and neither would their tears as they went against all odds. They were the heroes people dreamed about; they were invincible, but unfortunately for them, they were not as great as they would like to think themselves to be.
They were bigger than their bodies. Thinking bigger, dreaming bigger, being bigger than their pathetic shells would allow until the strain became too much and they broke, though it wasn't always their body. Sometimes the thought of being limited by something so superficial became too great, their undeniable urge to do more too strong and they'd kill themselves to rid them of the weight that held them from greatness. The idea of being limited by something so vulnerable spat in the face of their beliefs. Shinobi could not die from flesh wounds. They died by swords and sickness of their own hearts. They would not die unless it was of their own accord, but their own stubbornness could not always save them. Shinobi were only as great as their pathetic bodies would allow them to be. However strong they were, they were condemned by their frail bodies. Shinobi were doomed to live and die by their own duality, and that was something Hatake Kakashi would drink to.