Who said "Too much is the same as too little."?

Miyamoto Musashi (c. 1584–1645). Source: The Book of Five Rings, Earth (Knowing Your Weapons).

What is the original Japanese?

あまりたる事はたらぬと同じ事也. Translated from the original Japanese by Spartan Surfers.

Too much is the same as too little.

Miyamoto Musashi, The Book of Five Rings, Earth (Knowing Your Weapons)

The source

"Too much is the same as too little." Miyamoto Musashi said it in The Book of Five Rings, Earth (Knowing Your Weapons). Translated from the original Japanese by Spartan Surfers.

"あまりたる事はたらぬと同じ事也"

Original Japanese, The Book of Five Rings, Earth (Knowing Your Weapons). Japanese: Miyamoto Musashi (Kinkodo, 1909), NDL digital text.

Who said it

Miyamoto Musashi (c. 1584–1645). Undefeated swordsman who wrote The Book of Five Rings in a cave a few weeks before he died.

Questions

Who said "Too much is the same as too little."?: Miyamoto Musashi (c. 1584–1645). Source: The Book of Five Rings, Earth (Knowing Your Weapons).
What is the original Japanese?: あまりたる事はたらぬと同じ事也. Translated from the original Japanese by Spartan Surfers.