Biological Impermanence Quotes

Nature is a hanging judge," goes an old saying. Many tragedies come from our physical and cognitive makeup. Our bodies are extraordinarily improbable arrangements of matter, with many ways for things to go wrong and only a few ways for things to go right. We are certain to die, and smart enough to know it. Our minds are adapted to a world that no longer exists, prone to misunderstandings correctable only by arduous education, and condemned to perplexity about the deepest questions we can ascertain.

On the basis of biological, sociological, and historical knowledge, we should recognize that the individual self is subject to death or decay, but the sum total of individual achievement, for better or worse, lives on in the immortality of The Larger.

Individuals are not stable things, they are fleeting. Chromosomes too are shuffled into oblivion, like hands of cards soon after they are dealt. But the cards themselves survive the shuffling. The cards are the genes. The genes are not destroyed by crossing-over, they merely change partners and march on. Of course they march on. That is their business. They are the replicators and we are their survival machines. When we have served our purpose we are cast aside. But genes are denizens of geological time: genes are forever.

Once DNA acquires the ability to persist forever, the carriers become disposable. Essentially, our bodies are designed to last long enough to reproduce.

My dear, dear girl [. . .] we can't turn back the days that have gone. We can't turn life back to the hours when our lungs were sound, our blood hot, our bodies young. We are a flash of fire--a brain, a heart, a spirit. And we are three-cents-worth of lime and iron--which we cannot get back.

In fact perhaps the only law in biology is that all flesh is mortal and all species become extinct eventually.