I've had feelings of awe and even bliss and euphoria out in nature, which is probably mixed in with whatever chemical is happening when I'm running. It was a state of feeling more than a state of intellect. You know, like you're sensing things in a different way than you normally do. And it also seems like if it did last long, then it would cease to be mystic, it would just be your normal experience. No. Mystical states cannot be sustained for long, except in rare instances,. Half an hour or at most an hour or two seems to be the limit beyond which they fade into the light of common day.