Who said "The real fighter doesn't weigh win or loss. He goes all in."?

Yamamoto Tsunetomo (1659–1719). Source: Hagakure, Book 1.

What is the original Japanese?

曲者といふは勝負を考へず、無二無三に死狂ひする計りなり. Translated from the original Japanese by Spartan Surfers.

The real fighter doesn't weigh win or loss. He goes all in.

The source

"The real fighter doesn't weigh win or loss. He goes all in." Yamamoto Tsunetomo said it in Hagakure, Book 1. Translated from the original Japanese by Spartan Surfers.

"曲者といふは勝負を考へず、無二無三に死狂ひする計りなり"

Original Japanese, Hagakure, Book 1. Japanese: Hagakure, vol. 1 (1937 printing), NDL digital text.

Who said it

Yamamoto Tsunetomo (1659–1719). Samurai turned monk whose spoken reflections were written down as Hagakure, Hidden by Leaves.

Questions

Who said "The real fighter doesn't weigh win or loss. He goes all in."?: Yamamoto Tsunetomo (1659–1719). Source: Hagakure, Book 1.
What is the original Japanese?: 曲者といふは勝負を考へず、無二無三に死狂ひする計りなり. Translated from the original Japanese by Spartan Surfers.