metabolism
Some people seem to have a metaphor like "let's blow in a new wind" when they say, "we need a metabolism."
But how bone metabolism occurs, for example, is that osteoclasts break down existing bone and osteoblasts create new bone in the gaps.
Metabolism is destruction and new birth, where the amount of destruction and the amount of new birth are in balance, so that destruction cannot be observed from a distance, but the components remain new. (2017-09-16)
PS
We tend to think, "Let's add something new," but first we need to "destroy what no longer works." (2018-02-17)
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