So I started thinking lately, who am I? Am I my memories, all the things I've done, thought, and felt up until this moment? Or maybe the only thing that matters is what I'm thinking and doing at this moment. Or could the self even encompass the future--all the decisions I haven't made yet but will at some point? And another thing, am I what I do, or am I something more? What is the "self", and how can it be defined?