Imagine you had an engine but the spark plugs were missing and imagine nobody was their who knew it should have spark plugs. You wouldn't be able to find someone who could teach you to get it working. Your only hope would be if you could somehow figure it out yourself. This is basically the situation with these yogic and Taoist longevity techniques, parts of it are there but parts of it are missing and no teacher is there to help you with finding the part that are missing because they don't know themselves. Sivananda Saraswati the guy who wrote that book died at 75
@@MartinFaulks I didn't understand. I follow you on RU-vid, and I've found immense wisdom in your discourses. But where do I find the "scientific" explanation?