He uses the famous metaphor of the moon reflecting on water:
The Unfettered Mind by 17th-century Zen monk Takuan Sōhō offers foundational teachings on martial arts and spiritual clarity, emphasizing "Immovable Wisdom" and "No-Mind" (mushin) to overcome mental fixation. The text, which profoundly influenced both traditional combat and modern leadership, argues that a truly proficient mind remains fluid and unattached to any single thought or action. Read the full text at Terebess Online . THE UNFETTERED MIND - Library of Agartha unfettered mind pdf
The untrained mind stops at the honey, the enemy, or the insult. The trained mind sees the honey, tastes it, and moves on. He uses the famous metaphor of the moon
However, caution is required.
When you catch yourself chewing on a worry (e.g., "I am afraid I will fail this presentation"), recognize that your mind has "stopped" at the fear. Do not push the fear away. Instead, shift your attention to the physical sensation of typing, walking, or breathing. The unfettered mind moves through the fear rather than living in it. THE UNFETTERED MIND - Library of Agartha The
Here, Takuan dives deeper into the metaphor of the sword, not just as a weapon, but as a symbol of decision-making and cutting through delusion. He argues that the true sword is not made of steel, but is the "Sword of the Spirit." This section resonates deeply with anyone facing difficult choices. It posits that the ability to cut through hesitation and doubt is an internal capability, accessible only when the mind is free from attachment to outcomes.