Water is fluid, soft, and yielding. But water will wear away rock, which is rigid and cannot yield. As a rule, whatever is fluid, soft, and yielding will overcome whatever is rigid and hard. This is another paradox: what is soft is strong.
LaoziHow can a man's life keep it's course If he will not let it flow, Those who flow as life flows know They need no other force: They feel no wear, they feel no tear, They need no mending, no repair.
Laozi