>>There's another element at work here, though.
>>We're definitely lucky when a door suddenly opens for us with no prior activity on our part.
>>However- not everyone chooses to walk through that door and that makes all the difference, doesn't it?
>
>Why does one walk through and another not?

Now there's the attitude that matters - the audacity to throw everything away and start anew, the hunch (or should we call it the sense of probability) that it may turn out well, the (intuitive?) calculation of chances, and perhaps the excitement that prods some people into action while others don't feel adventurous?

Even as I consider myself lucky, I usually say that I had "either the luck or the smarts" to be in that right place at the right time a sufficient number of times. Sometimes I can trace some of the events to my being quick to react when needed, or to having sounded some ideas to people who passed this on and the information came to the place where I was needed, but that can explain perhaps a tenth of it.