Be satisfied.

I was entirely exhausted to have got paid attention to from my students most of whom were, as usual, continuously distracted by whatever reasons I don't even sometimes guess, as I barely managed, thinking that this would be the last job to be done before calling it a day, to call a mother to report how his son is doing in the class, which we do very routinely. She was panting as she took the call and she helped me not to be bothered to ask why with the answer that she just came back from her work, which was followed by extra information that she spent more than half a day at the work. She sounded as if she was also totally worn out. I, suddenly, became ashamed. 'I am teaching these students whose parents are working much more and harder than me at the works whose curcumstances might be even poorer to make their children's tuition fees part of which will end up in my income.' Having ended the call, I couldn't help but be determined not to grumble, though it doesn't mean I'm doing so now, at my surroundings whatever may happen.