I think the answer is that a circle has no beginning
I could be wrong, but this is how I understood the response: Every circle, of course, starts at one point – but not inherently. It happens to have started at one point by pure coincidence, and continued round. Once it has come full circle and is continuing, the starting point is no more than a historical fact. The question of “What came first, the Chicken or the Egg” isn’t just a trivia question of fact. It is a question about the essence of a Chicken/Egg; which is the ?? and which is the ??. The same is true in any causality chain where A causes B which causes A which causes B. Wherever it started plays no role and has no significance.