i especially liked this part:
"While it can be great fun to hit a purpose-built mountain bike trail specially designed to maximize and maintain flow, theres a special satisfaction that comes with cleaning that craggy old bike-hostile trail with the inconvenient root garden and the super-tight, v-shaped switchbacks with rock drops right at the crux of the turns. I believe eliminating the latter and replacing it with the former chips away at an important part of the soul of our sport."
We don't know what our limits are, so to start something with the idea of being limited actually ends up limiting us.
Ellen Langer