If you do a yoga that does not change the patterns of energy within you, I would say, don't waste your time on it.
The essence of spirituality is, to be constantly aware of the oneness of all; at the same time to celebrate the uniqueness of the individual.
Meditation is the nourishment for flowering.
The methods and technologies of how to experience that which is beyond the physical is what is known as the science of yoga is a longing. Only when your longing is cranked up to peak intensity, knowing becomes a possibility.
With yoga, not only your body should become flexible - your mind and emotions, and above all your consciousness should become flexible.
If only there is a sufficient number of people whose experience of life goes beyond body and mind, this world will be a very different place.
The science and technology of how this life functions and what we can do with it, is what we refer to as yoga.
If you can break the illusion that you are separate and begin to experience the oneness of the existence, that is yoga.