The word ‘Yoga’ means ‘union.’ Union means you begin to experience the universality of who you are. For example, today, modern science proves to you beyond any doubt that the whole existence is just one energy manifesting itself in various forms. If this scientific fact becomes a living reality for you – that you begin to experience everything as one – then you are in Yoga. When you are in Yoga, you experience everything as a part of yourself. That is liberation, that is mukti, that is ultimate freedom.