I have been told I am lucky all of my life.
Privileged, fairly attractive, good job, decent, successful husband.
Lots of my contemporaries were more privileged but have been pedestrian, had bad marriages, lost money, etc.
Nobody sees my narcissistic mother, the emotional abuse as a child/adolescent, the recurrent miscarriages.
In my 20s when I was working my socks off, friends who later complained that I was lucky, told me I was nuts. People in my 30s told me it was unacceptable that dh worked 12 hour days and I did all home stuff. Am I lucky, or did/do I have good judgement and a personable countenance.
Mostly I am very positive and can do. It makes a huge difference.
My MIL thinks she isn't lucky, her glass is always half full, others always have more. She never sees all the good stuff.