Memory makes us. If we couldn't recall the who, what, where, and when of our everyday lives, we would never be able to manage. We mull over ideas in the present with our short-term (or working) memory, while we store past events and learned meanings in our long-term (episodic or semantic) memory.
What's more, memory is malleable–and it tends to decay with age. So stay sharp by reading our articles on the science of recollection.