In our local shopping centre is a middle-aged Chinese man who washes the windows.
Every time I see him working, he has a big smile on his face and is either singing or whistling to himself.
It’s not a fun, glamorous job and he doesn’t work in great conditions, but he is always singing.
When he’s working outside on a stinking hot day in the middle of summer, he’s singing.
When he’s working outside on a freezing cold, windy day in the middle of winter, he’s singing.
Whether customers smile at him, scowl or just ignore him, he’s singing.