Your mind is all you are. Your thoughts, memories, and feelings are what make up the entirety of your identity and being. “You” are a seemingly infinite number of neurons and electrons rapidly firing nonstop throughout the entirety of your life until one day it will shut down and cease all function. Then “you” will be gone.
If our thoughts and memories and feelings are what “we” are, then without them we will collapse, or perhaps disintegrate. This is what happens to Bill, the hapless protagonist of Don Hertzfeldt’s animated masterpiece IT’S SUCH A BEAUTIFUL DAY.