Surely I could only be smug if I'm one of those people who's convinced everything I've achieved in life is through my own efforts, and I owe nothing to anyone else. And if other people aren't as fortunate, that's entirely due to their personal failings.
All of which is patently absurd. Because I'm acutely aware that whatever I've achieved is only very partly through my own efforts. It's mostly down to all sorts of other things I had no say in - the country I live in, my family, my education, my physical and mental health, people I ran into, sudden unexpected opportunities. And the most important factor - a lot of good luck.
I got my first bookselling job because the bookshop concerned had just sacked six employees for misconduct (being drunk in the shop) and they needed six new employees in a hurry.
Jenny and I were able to buy a large detached house because of constantly rising property prices which worked to our advantage. When we met, Jenny had one room in a shared house and I was living in a tiny bedsit.
I landed several jobs because of my good command of English - which goes back to a brilliant English teacher at my prep school.
And of course the biggest bit of luck was meeting Jenny. We've achieved so much together that we couldn't have managed on our own.
So no, I'm not smug. On the contrary, I still doubt myself in all sorts of ways and never believe I'm as intelligent and capable as others seem to think. I always feel as if I'm fumbling my way through life and could come a cropper at any moment.
Good luck isn't guaranteed.