“If we can replace everything—cells, tissues—as we live, then there would be presumably no limits to how long we could live. But if we replace our neurons, we’re also rewriting our own experience in the process, and cease to be ourselves. I think that’s the real penalty for extending life beyond the natural maximal lifespan of a neuron, which is 120 years or thereabouts. That’s where I see the real limit. How do we prevent our brains from effectively losing mass over time, losing neuronal connections, losing synapses, which is where we’re storing memories and experiences?”

Explore more quotes:

About the author

This page was created by our editorial team. Each page is manually curated, researched, collected, and issued by our staff writers. Quotes contained on this page have been double checked for their citations, their accuracy and the impact it will have on our readers.

Kelly Peacock is an accomplished poet and social media expert based in Brooklyn, New York. Kelly has a Bachelor's degree in creative writing from Farieligh Dickinson University and has contributed to many literary and cultural publications. Kelly assists on a wide variety of quote inputting and social media functions for Quote Catalog. Visit her personal website here.

Kendra Syrdal is a writer, editor, partner, and senior publisher for The Thought & Expression Company. Over the last few years she has been personally responsible for writing, editing, and producing over 30+ million pageviews on Thought Catalog.