Source Page. Credit is to SMBC-Comics and even more credit to @aperson@beehaw.org who noticed it was missing and found the credit in this comment. Sorry about that and thanks, you're awesome aperson <3
How so?
Do you think I'm taking about something related to the entire physical body like Dark City?
No - I mean the continuity of consciousness inside your brain.
That potentially the part of you that IS you, your subjective experience of existing, might in fact die each night never to return and simply be replaced by a different new one spun up with access to the hippocampus and a sense of having lived a whole continuous life, none the wiser to the many past yous that came before and will never be again nor its own impending doom in just a few short hours.