The amazing thing about hiking in Yosemite (and indeed, being immersed in any nature experience) is that everything you thought was important suddenly feels meaningless.
The TV show you couldn't wait to watch, all the games on your backlog, all the little projects around the house, the dozens of unfinished things and anxieties intruding on your thoughts.
It all melts away, leaving you with nothing but a clear mind and a strong sense of gratitude for the beauty around you.