To me, William Shatner going into "outer space" was nothing more than a forgettable meh. I never liked the arrogant guy so whatever. Let him go up, be happy, so what.
That was before. Now, all the antipathy has been dismissed. His experience was utterly profound and it's one we need to pay attention to.
Earth=Life, Everywhere Else in the Cosmos=Death is one way to describe his epiphany. He + the others rushed through blue sky turning black, making their lives entirely dependent upon the shell they were in, now inhabiting the beginning of the rest of the universe which is lethal to all life. And below, the only place in the universe where life exists freely. And look at what we're doing to it now.
I'll have to watch the interviews again because right now that's all I've got.