That quote resonates a lot with me.
My lowest points are when life becomes too easy. When I start to miss the point of living.
I quit my job and moved to a new country because I was becoming complacent, repeating the same thing every day.
It's the moments closest to death when we are truely alive. Whether it's being struck by a disease, as Stephen Hawking tragically was all those many years ago, or climbing a mountain (and in my cause, getting stuck).