Neuroscientist Anil Seth says, each fraction of a second, millions of neurons work in your brain to generate your conscious self-experience — your experience of the world around you and of yourself within it. Without consciousness, there is no self, nothing.
Our brain receives signals from outside and also, inside. The signals that the brain receives from inside are not only of our experience but of millions of years of experience that has been passed through our DNA. Consciousness is an interception of two different signals: coming from outside (the sound and smell and noises and information) and coming from inside (of yourself and based on your beliefs and information).