All eclipses are, first and foremost, breaks in continuity. Investigate and see. When astronomers come across phenomena like that, they know they have a new kind of thing about to be discovered. This phenomenon gives us a huge clue into how astrology works as a meeting place of space-time. Part of the reason the nodes are so powerful is no doubt due to the occurrence of eclipses near them, which bring exactly together the Sun and Moon, two extremely important expressions of experience.
Nodes also represent the balancing of a polarity across the horoscope.
That, too, is powerful. The nodes are effective, we feel their effects, whether there is an eclipse or not. Therefore they must actually exist. My take is that eclipses and the points where they occur are obviously some kind of intersection point between this dimension and the next. It is worth mentioning here that eclipses of the Sun have somehow skipped occurring in Leo since the last one in July 1981, approximately 18 years ago.