Philosopher who purportedly said “The best fighter is never angry”

LAO TSE

This ancient Chinese thinker is traditionally credited with founding Taoism and authoring the Tao Te Ching, a text emphasizing harmony with the natural flow of life.

This clue points to Lao Tse (also spelled Laozi), the ancient Chinese philosopher traditionally credited with founding Taoism. The quote "The best fighter is never angry" aligns with his teachings in the Tao Te Ching, which emphasize calmness, non-aggression, and harmony. The name fits the answer format as "LAO TSE," though some crosswords may use "LAOTZU" as an alternative spelling. No wordplay is involved—it’s a direct reference to his philosophy.