Consciousness is the energy that exists within us.
This force is who we are, our spirit, our soul, who we are on the inside. This is consciousness, the awareness that separates life from matter, what makes us aware of our existence.
Inside us, we exist, and we perceive our existence through the utility of our mind as it calculates our existence through what we perceive. We exist externally, you see me, I see you, but neither are able to see through the eyes of the other. We only know a small part of the other, despite how it may seem.