Solitude, isolation, are painful things and beyond human endurance.

Solitude vivifies; isolation kills.

I can be by myself because I'm never lonely; I'm simply alone, living in my heavily populated solitude, a harum-scarum of infinity and eternity, and Infinity and Eternity seem to take a liking to the likes of me.

In spite of the opinions of certain narrow-minded people, who would shut up the human race upon this globe, as within some magic circle it must never outstep, we shall one day travel to the moon, the planets, and the stars, with the same facility, rapidity, and certainty as we now make the voyage from Liverpool to New York!

If you meet a loner, no matter what they tell you, it’s not because they enjoy solitude. It’s because they have tried to blend into the world before, and people continue to disappoint them.

You end up isolated if you don't cultivate the capacity for solitude, the ability to be separate, to gather yourself. Solitude is where you find yourself so that you can reach out to other people and form real attachments. When we don't have the capacity for solitude, we turn to other people in order to feel less anxious or in order to feel alive. When this happens, we're not able to appreciate who they are. It's as though we're using them as spare parts to support our fragile sense of self. We slip into thinking that always being connected is going to make us feel less alone. But we're at risk, because actually it's the opposite that's true.