Geoscience Reference
In-Depth Information
Section X
Math Concepts: Water Quality
Nothing in the world is more flexible and yielding than water. Yet when it attacks the firm and the
strong, none can withstand it, because they have no way to change it. So the flexible overcome the ada-
mant, the yielding overcome the forceful. Everyone knows this, but no one can do it.
—Lao Tzu, Chinese philosopher (600-532 BC)
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