Not sure if this is the best place to ask this question. If not please suggest a better.

I came across a great quote about evolution a while back. I thought I grabbed it, but now can't find it anywhere (including searching LW and the Web).

I seem to recall it was on LW and was by Eleizer, but I'm not sure.

It went something like: "Bodies (organisms) are not the meaningful units of evolution. They come and go, like evanescent wisps of smoke.  What endures, what persists, are alleles." And I think there was some mention of competition between two animals...the image of two mountain goats butting heads sticks in my mind, but I may be conflating with something else.

Does this ring a bell with anyone? Thank you!

Ernie