The path of Yoga can be described as the union of individual consciousness with Universal Consciousness. Paradoxically, there is a different union which presents an obstacle in this journey.
We think we know who we are. But that is not our individual conscious essence, it is a thought resulting from the complex fusion between mind and ego. As we identify ourselves with those thoughts, our consciousness gets entangled with them, making them difficult to separate. It takes great self-awareness to differentiate who I am as an individual consciousness, from who I think I am, coming from the ego-mind complex.