Why you come off the mountains different than you go into them

In February my friend and I did a four day trek through the Rwenzori mountains that border Uganda and the Congo. For four days we did nothing but hike, laugh, eat, splash in icy rivers, stand wide eyed at the sleeping beasts of mountains around us. We were sweaty and muddy, miles away from cell service. We squatted over holes in the ground for the bathroom and warmed water over a fire for bucket showers. We stood under a sky blanketed by the brightest stars I have ever seen and we fell asleep at 9pm, laughing until we couldn’t stay awake anymore.