“The most effective way to live is as a warrior. A warrior may worry and think before making any decision, but once he makes it, he goes on his way, free from worries or thoughts; there will be a million other decisions still awaiting him. That's the warriors' way.”

Variant translation: First, as is often said, a samurai must have both literary and martial skills: to be versed in the two is his duty. Even if he has no natural ability, a samurai must train assiduously in both skills to a degree appropriate to his status. On the whole, if you are to assess the samurai's mind, you may think it is simply attentiveness to the manner of dying.
Go Rin No Sho (1645), The Ground Book

Go Rin No Sho (1645), The Book No-Thing-ness
Context: To attain the Way of strategy as a warrior you must study fully other martial arts and not deviate even a little from the Way of the warrior. With your spirit settled, accumulate practice day by day, and hour by hour. Polish the twofold spirit heart and mind, and sharpen the twofold gaze perception and sight. When your spirit is not in the least clouded, when the clouds of bewilderment clear away, there is the true void.

The Manual of the Warrior of Light (1997)
Context: Every Warrior of the Light has suffered for the most trivial of reasons. Every Warrior of the Light has, at least once, believed he was not a Warrior of the Light.
Every Warrior of the Light has failed in his spiritual duties.
Every Warrior of the Light has said "yes" when he wanted to say "no."
Every Warrior of the Light has hurt someone he loved.
That is why he is a Warrior of the Light, because he has been through all this and yet has never lost hope of being better than he is.
Each stone, each bend cries welcome to him. He identifies with the mountains and the streams, he sees something of his own soul in the plants and the animals and the birds of the field.
Then, accepting the help of God and of God's signs, he allows his personal legend to guide him toward the tasks that life has reserved for him.
On some nights, he has nowhere to sleep, on others he suffers from insomnia. "That's just how it is," thinks the warrior. "I was the one who chose to walk this path."
In these words lies all his power: He chose the path along which he is walking and so has no complaints.

Source: The Wheel of Time: Shamans of Ancient Mexico, Their Thoughts About Life, Death and the Universe], (1998), Quotations from A Separate Reality (Chapter 6)

Source: The Boy Crisis (2018), pp. 176

Source: The Wheel of Time: Shamans of Ancient Mexico, Their Thoughts About Life, Death and the Universe], (1998), Quotations from "Tales of Power" (Chapter 10)

The Art of Peace (1992)
Context: The real Art of Peace is not to sacrifice a single one of your warriors to defeat an enemy. Vanquish your foes by always keeping yourself in a safe and unassailable position; then no one will suffer any losses. The Way of a Warrior, the Art of Politics, is to stop trouble before it starts. It consists in defeating your adversaries spiritually by making them realize the folly of their actions. The Way of a Warrior is to establish harmony.

Recalling Rudd's psychological status in January 2010, following the December 2009 Climate Change Summit, in Copenhagen.
The Killing Season, Episode two: Great Moral Challenge (2009–10)

Source: The Wheel of Time: Shamans of Ancient Mexico, Their Thoughts About Life, Death and the Universe], (1998), Quotations from A Separate Reality (Chapter 6)