Inch forward, little by little, like an inchworm.

The source

"Inch forward, little by little, like an inchworm." Yamamoto Tsunetomo said it in Hagakure, Book 1. Translated from the original Japanese by Spartan Surfers.

"少しづゝ先へ先へとにじり申すものに候 ... 尺蠖の樣に"

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 "Inch forward, little by little, like an inchworm."?

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

What is the original Japanese?

少しづゝ先へ先へとにじり申すものに候 ... 尺蠖の樣に. Translated from the original Japanese by Spartan Surfers.