This meditation and breathing exercise is not part of our study. Because we are following a method which is direct method. I will give you the example. Just like there is a skyscraper house, and there are staircases to go to the top floor, say, hundredth floor, and there is elevator also. So if you take advantage of the elevator, you reach immediately hundredth floor within a minute, but if you go step by step, step by step, it will take hours.
So this meditation process is not possible at the present age. This meditation was recommended, according to Vedic literature, in the golden age, when the duration of life was very, very long, people were peaceful, there was no disturbance. The exact version in the Vedas is kṛte. Kṛte means in the golden age, when everyone is pious. That is called kṛta-yuga, age of kṛta, very pious age. So in those ages people used to live one hundred thousands of years, and they were very pure; there was no sinful activity. In that stage, meditation was possible.