In one sense, each person is their Universe. Everything they perceive or conceive is part of them, so i would identify with the whole Universe, as could anyone else. I would also say that in scientific terms, whatever that means, i am more than my brain and also more than my memories. I am more than my brain because my mental states depend on other factors, such as my hormones and the state of the nervous system in my bowels. I am more than my memories because even if they were all gone, i would still be the anxious, shy and nervous depressive person i am now, because that's down to things like the nature of my autonomic nervous system, the quantity of amine neurotransmitters my limbic system produces and so forth.
In another sense, i am breath. Breathing is my fundamental need, and the most basic physical act i can perform which is at all under the control of my will. Since i am not deaf, language as the basis of my thoughts and therefore all that makes me human, and in particular this particular human, is based on my having learned to speak, which introduced me to words and therefore articulate ideas and culture. Therefore my soul is in a very important sense based on my breath, as is acknowledged by the Judaeo-Christian, Yogic and Stoical views of the world, among many others.
In another sense, i am a flame of the eternal creative fire that made and sustains the world, though this is more metaphorical.
I'm a philosophical counsellor.