All are centres of affection, really. They appear to be otherwise sometimes on account of a misconstruing and miscalculation of fact that we make in our perceptions. One is only going to realise this truth. It is not that Yoga is not here now and it is going to take place afterwards. It is not a product artificially to be concocted with the effort of the human being.
Yoga is an eternal truth.
We have only to wake up from sleep and see what is there. So, Yoga is not a creation of something which is not now and is to be there after some time. It is rather a consciousness into which we rise as we wake up from deep sleep and become aware of the world outside. Yoga, when it is said to be a gradual developmental process, is really a development and enhancement of the consciousness of reality, an increase into a depth of the awareness of things and the lessening of the gap that appears to be between us and the world. Later on it can be even for a lifetime.