Surely you move through the world. You walk down the street. You walk into a building.
At the same time, the world moves through you. The air you breathe becomes you. The water you drink becomes you. The food you're eating becomes you.
In fact, you are part of the whole works-- inseparable from the universe. Even after dying, you leave effects sincerely felt by others. Your children have offspring. Those you loved in this life remember you. You’ve learned lessons from other people, and the lessons you taught others prevail.
You can figure out who you really are by considering how you flow through the world, and how the world flows through you.