The author suggests a divine plan behind the interactions of those within a karass, but adds it is unlikely that it's purpose will ever be revealed. I suspect it is, like the universe itself, recursive in function.
In summary, to begin to understand one's karass and those who are entwined within it, simply look for a common denominator between all those you have spent substantial time with, by choice or otherwise. The collective experiences garnered through these contacts both become and determine one's karass.
Through mutual friends we kept in touch for 5 or so years after college, then were disconnected again when I moved to California. A few months ago we found each other once again in the metaverse, and I just sent him an email today explaining karass, and how I always saw us as part of one. Disappointed after looking into what was available via Google, I ended up here posting this definition. Karass?