When asked what he thinks about other climbers saying that what he is doing is unsustainable, a line from his answer caught my attention:
"...but i don't think i will stop because of all the risk and all that. I think i'll stop because i'll just lose the love for it."
It's something what I also feel about running. I think not only in running, but in other things I do, I would try my best that I really really love it.