Well... once upon a time there live unchallengable people living in an unchallangeable society. Everything was unchallenging...
People didn't know what to do when they came across something they were unfamiliar with. A log had fallen on the road, they came across a crossingless crossing, a horse that had never been mounted, a moon that had never been landed on... They didn't know what to do!!!
Then, along came Guru Somebody who said 'Just harden up and select the challenge.' (Some meaning may have been lost in translation)
And that's just what were doing here. Enabling you guys and gals to charge up and accept the challenge.