Why does it hurt when we sit here? why should one sit in meditation? Sitting in meditation subdues the mind. when we sit we cause all the energy and blood in the body to return to its original source. And, we cause all the apertures which have not been passed to be penetrated through. Of all the places in your veins where the blood ordinarily does not flow, it is forced to flow there now. So, just as you're sitting here your blood and energy are traveling around. Usually, when we are walking, lying down, or just sitting for not such extended periods of time, the blood and energy just travel along their ordinary routes of circulation. But, sitting as we are now will cause all the obstructed places to be penetrated through. It is like in water pipes - in some places the water flows through; in some other places the water's stopped up, it can't flow through. Now, in the way we are sitting, the blood and energy will all penetrate through, especially if you sit in fll lotus positions. When you sit that way, it's not easy for the blood and energy to flow through your legs, so you feel pain. If you apply skill to this pain, when the time comes, quite naturally, there won't be any more pain. At that time the final victor is you.