"The useless can become the most useful."
Chen Xuan chuckles.
"What do you mean?"
Eugene frowns.
"Imagine a tree that would sink if used to build a ship, would rot too quickly to be used for a coffin, would break too easily to be a utensil, and would be too ill-fitted to make into a door."
Rather than answering directly, Chen Xuan poses an apparently unrelated question, "How would you evaluate this tree?"
"Useless."
Eugene snickers, "So your idea of swordsmanship is to make someone useless?"
"From a human perspective, such a tree, which seems to be of no use, is indeed useless."
Chen Xuan nods noncommittally, "But from the tree's perspective, this is actually the most suitable condition for survival, since it holds no appeal for humans, and hence, it will not attract unnecessary harm. Often, it ends up growing most robustly."
"..."