The difference between the Japanese and the American is summed up in their opposite reactions to the proverb (popular in both nations), “A rolling stone gathers no moss.” Epidemiologist S. Leonard Syme observes that to the Japanese, moss is exquisite and valued; a stone is enhanced by moss; hence a person who keeps moving and changing never acquires the beauty and benefits of stability. To Americans, the proverb is an admonition to keep rolling, to keep from being covered with clinging attachments.

(Other Authors and Sources)
Carol Tavris, Anger: The Misunderstood Emotion, ch. 4 (1982)