Loneliness is bad for the heart (literally)

[sciencedaily.com]

When I am by myself I am not alone.

That's great writing.

Loneliness? What's that? I love being alone, and have been single since 2010, to my vast relief. I don't mind being around people for a while, then I want to leave.

Cant agree in regard to the (albeit figurative) location, though its a poetic sentiment- Loneliness can be felt anywhere and everywhere. We are loneliest when separated from those we love, and this can be beyond our personal control.

For me, "being alone" is acceptable, sometimes desired, but being lonely, not so much.
I don't have to be lonely just because I'm alone.
I can be very comfortable with my own company at times, so I'm not lonely.

When I was younger I use to think I was lonely, but as I aged I realized it was actually at a kind of cross road where my mind couldn't decide which way to turn so it was a mental paralysis. I also found that the easiest way to short circuit that state of mind is to physically exhaust myself ..... so I would go for a 20 km run. At the end of it I'd know exactly what I need to do and I would feel amazing because the endorphins were released and Id be high as a kite )) So these days, I love and look forward to that feeling of loneliness as I know something amazing is about to follow it.

It takes courage to live alone. Supreme courage to accept the life of a lonely person as one's destiny.

Without having read your source, I suspect he was speaking of the satisfaction one can obtain by creating one's own .... balance? morality? Based on his perception of ethics, what was grand and inspiring about the past...
No one else might understand, for this universe is formed solely from the history of the individual.

I can relate to that. Not 100% certain why.
I caused my loneliness, and yet my ego has me standing my ground on the other side of bridges I burned.... Can't say I'm fascinated by it though. I'd say it consumes me.