 What is being referred to as astral bodies is just allowing the etheric body to float around. It needs enormous sadhana for a person to do that. Getting the pranic body out and putting it back is easy. Ethheric body needs much more sadhana. So, it's the research journey, both of the bodies stay out for some time and then come back. See, most of the people, I know there's a lot of stuff going on here. In the United States, everybody is doing astral journeys, it's just hallucination, okay? You lie down and just imagine that you're flying here or flying there, that's not it. Unfortunately, everything becomes ridiculous when all kinds of people start handling it. What is being referred to as astral is there are five kinds of bodies, physical body, mental body, energy body, etheric body and bliss body. These are five dimensions of the body. We are referring to everything as body in yoga so that you can understand it as a physical entity. Though the last two are not physical, still we are referring to it as a body because yoga is a method, not a philosophy. It is not a philosophy, it is a method. So, we are seeing how to employ a certain method to make use of certain things. What is being referred to as astral body is leaving the physical body, mental body, energy body and the bliss body intact and just allowing the etheric body to float around. That means you can conduct your activity here because your physical body, mental body, energy body is intact. But just allowing the etheric body to go, that's a certain kind of mastery. You can't just psych yourself into it. It needs enormous sadhana for a person to do that. Compared to etheric body, pranic body is physical. It's more physical kind of presence. It's energy, but it's a physical energy. Ethheric is a transitory energy. It is neither physical nor beyond. It is a transition. Bliss body is totally beyond the physical. So, getting the pranic body out and putting it back is easy and it's a much stronger experience because a physical part of you goes out and gets back. Ethheric body needs much more sadhana because that is not even in your experience. It is not something that you can touch unless you're in a certain level of sadhana and intensity within yourself. But every street corner they are doing astral travel these days, that's just hallucination.