Biological processes like development, aging, and perception occur on different time scales but are fundamentally processes, not static nouns.

“I mean, I know everything in biology is a process. We would never ever say, oh, the perception of that red line on a painting is a noun. I mean, it's an event in the visual system. You're abstracting some understanding about that thing in the outside world. And I think it's very useful in thinking about the brain. People will notice I notice-- I, excuse me, actively avoid the use of the word mind, because I figure, especially, with sitting across from me, that I'll step in it if I do. But the brain generates a series of perceptions or what have you by through processes, not nouns. And so when thinking about biology, I think of development is an arc of processes. Aging is an arc-- perception is an arc of processes. They just exist on different time scales.”