It's a great quote. 'Question everything' is an old anarchist saying. However, it requires action beyond the words to be truly meaningful. I cannot, and wouldn't want to pick fault with anything in your second sentence.
Erikmen, you post some good stuff, and I'm not picking a fight, but the last quote here annoys me. Try saying it to someone with peripheral vascular disease. I admire the sentiment but the practicality is not there for everyone. Its like these athletes who say "If I can do it, anyone can". Pretty condescending to those with unfixable physical frailties. Eddie Izzard said it when he walked his 49 marathons in 49 days (or whatever it was). The ideal may be worthy. But it is not a truism.
And yes, I have PVD. I used to climb mountains for fun. I now stop every 200 yards (max) when walking anywhere. Even if there are many noble interpretations of the quote, it comes across as trite and cruel to me.