We are often unaware of the gradual decline and the erosion in our lives but not unaware of the gnawing feeling it brings.

it may only be able to measure it.

The water and the wind will wear the wood down, until only water and wind remain.

A wise person is like a smoothly polished rock: it takes time to become either.

I don’t drink water, because if water can erode rock, think what it can do to flesh.