I have been think about it like this

I used to think that I was a hard worker. But I am pretty sure i have never worked as hard as i have worked for the last two years. And the realization that i will work even harder in the future is very frightening. And the reflection that there are people all over the world who work even harder than this and are less rewarded, and less comfortable--this is humbling. But then, it makes me feel, maybe we are all in this together. And then the work has meaning, and the hardness has meaning. And purpose, this feels good.