We're all the same humans. Why fall behind anyone?

The source

"We're all the same humans. Why fall behind anyone?" Yamamoto Tsunetomo said it in Hagakure, Book 1. Translated from the original Japanese by Spartan Surfers.

"同じ人間が誰に劣り申すべきや"

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 "We're all the same humans. Why fall behind anyone?"?

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

What is the original Japanese?

同じ人間が誰に劣り申すべきや. Translated from the original Japanese by Spartan Surfers.