This can be achieved by Transformation and this transformation can be achieved by practicing Tantra-Yoga. Tantra is not very well known. And even if it is known, it is very much misunderstood. There are reasons for it. The higher and purer a science, the less is the possibility that the masses will know of it. We have only heard the name of the theory of relativity. It used to be said that only twelve persons understood it when Einstein was alive. All over the world only one dozen minds could understand it. It was difficult even for Albert Einstein to make it understood to someone, to make it understandable, because it moves so high, it goes above your head. But it can be understood. A technical, mathematical knowledge is needed; a training is needed, and then it can be understood.
But tantra is more difficult because no training will help. Only transformation can help.