“It is not the mountain we conquer but ourselves.” – Sir Edmund Hillary
There is nothing more gratifying for a trekker than reaching the top of a mountain after an arduous ascension. The view and the sensation of being on top of the world erases all pain and tiredness, believe me!
Just a note: The further up from sea level you climb, the pressure of the entire atmosphere decreases so in effect, there is less air to breathe. Less air means less oxygen. At sea level our blood is 98% saturated with oxygen and this decreases to 89% at 3000 mts and will down to 40% at heights above 8.000 mts.