Quote:Probably reading up of Michiavelli's "The Prince"
And, since we don't know anything about Jinnai's extrascholastic activities (he has to have -some-), it's not beyond reason that he'd come up with one or more of them.
plus Musashi's "Go Rin No Sho"
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Into terror!, Into valour!
Charge ahead! No! Never turn
Yes, it's into the fire we fly
And the devil will burn!
- Scarlett Pimpernell