I haven't yet got the Energy Parami perfected, so I don't know. But it sure would be nice to have endless physical energy and endless mental energy! I'm afraid I'm not the Buddha so I can't tell you what it would be like to have it perfected. I don't know. But certainly, when we increase our Energy Parami, mental energy will often give us a lot of physical energy. I recall reading in the scriptures about someone questioning the Buddha about his energy, and he said something like this: Four young monks could ask him Dhamma questions nonstop for one hundred years and they would die before he got tired of answering them. But I'm afraid I haven't got that sort of energy, because I get a bit tired! But certainly if one has one's energy perfected, I would imagine that one would have a lot of mental and physical energy.