If man has no tea in him, he is incapable of understanding truth and beauty.

The saying uses “tea” as a shorthand for the civilizing, contemplative qualities associated with tea culture: calm attention, hospitality, and a refined sensibility. Read this way, it is less a literal claim about caffeine than a humorous exaggeration: without the pause and ritual that tea represents, a person becomes too hurried, coarse, or distracted to perceive subtler things—“truth and beauty.” The proverb also reflects a broader East Asian idea that everyday practices (like preparing and sharing tea) can cultivate moral and aesthetic awareness, training the mind toward clarity, restraint, and appreciation.