According to Advaita (non- dual) philosophy, everything appears in your consciousness and nothing exists apart from your consciousness. Can you experience anything, including yourself, without the consciousness? Therefore, you must necessarily be the consciousness as you can't deny or doubt your own existence.
The matrix of Time, Space, Causation and everything bound by this matrix, including your Body, Mind and Intellect, are nothing but your own projection in your own Self. You do this every night while dreaming. In the dream, don't you project a universe of things and beings, including yourself, moving around in the matrix of Time, Space and Causation? What happens to this universe when you wake-up? Doesn't it fold back into your own mind? Don't you dismiss it as illusory upon waking? Your suffering starts when you identify with your projected individual Body, Mind and Intellect as the only existence. You thus lend reality to such illusive identification. Instantly, everyone else and everything around you also become separate and real for you.
You have a choice to remain that way and suffer or realise your original nature of pure consciousness (having infinite potential to project anything) and see everything appearing in you as your own reflections. How can you now suffer from your own reflections? How can you harm, hate or get annoyed with any reflection? You will only get amused by what you perceive as a play of your own consciousness, just as a child enjoys viewing various colourful patterns changing continuously in the Kaleidoscope.
