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The concept of water being more powerful than stone is a Taoist concept first attributed to Lao Tzu 5th–4th century BCE, China. As with many Taoist concepts, it was quickly adapted by Buddhist teachers. With the spread of Buddhism, especially Zen, the concept migrated into Japan and throughout the world.
The concept is often illustrated with the idea of a river, over time, cutting through mountains of rock and stone.
16, POTD, Proverb of the Day,