TL;DR Existentialism

[we] are nothing but a bundle or collection of different perceptions, which succeed each other with an inconceivable rapidity, and are in a perpetual flux and movement.

David Hume, in A Treatise of Human Nature, Book I, Part 4, Section 6, ‘Of Personal Identity’

I’ve mentioned before that a friend once said something similar to this, in that ‘we are nothing but a collection of traits’.

While Hume said it more fancily, and perhaps validated my friend, I still like her version best.