What is a person? What are you?
Mostly we don’t exist. The self, the thing that we experience as such, is one of many mental constructs, and not a particularly important one.
What each of us is is a collection of active ideas. Memes is the trendy word. The mind is only a vehicle and an environment for them. If we want to undertand human actions and work effectively with each other, or take moral decisions, the conscious mind or the self aren’t very useful theories. The garden of ideas is the theory that works.