I got through grad school, became a key part of a world-class Ultimate (Frisbee) team and worked on becoming a good writer. But nothing in my life has been nearly as difficult as being a parent. My almost-three year old son had a pair of asthma attacks Tuesday night/Wednesday morning: the second easily being the worst he's ever had.
We were basically holding him down to keep the mask on his face, while he yelled, cried and tried to breathe. That's hard. Hiking up the side of a mountain as a conditioning exercise is a walk in the park compared to that. The decisions you have to make and things you have to do for your child's welfare, far exceeds the difficulties of other aspects of life. At least, they do for me.
This is a past treatment that went well. It's the exception. Fortunately, he switched to a new treatment method yesterday and it goes much easier for him.