Ketu in Sagittarius – South Node in Sagittarius:
We have an instinctive knowledge of philosophy, theology, and abstract truth along with the desire to pursue these studies. We have a tendency to take in so much that we start waffling where our belief system is concerned and we can get too caught up in intellectualizing and cross-examining a myriad of thought systems that we never arrive at a truths that personally resonate.
The South Node in the 9th is fill us with optimism and a tendency to cram our ideas down another’s throat. South Node in the 9th also gives a genius for assimilating theology and metaphysics, but can also breed the Jerry Falwell syndrome — bang the book and condemn the infidels who refuse to do it MY way. (Source).