The Huffington Post -
13 Aug 2015 23:17

What is it that makes you push for the last ascent, or surge ahead when you've reached the putative wall that faces runners in the marathon and what, on the other hand, is going on when you start to feel the weakening of the spirit and the sickening feeling that tells you you're going to throw in the towel? Of course this spectrum of feeling applies to extra physical activities too and understanding instances where stamina is not simply a matter of physical strength or conditioning, throws a lig...
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