Interesting what he says about planets in houses they dont like

9.Mercury- Mercury in the 9th house is again forced to sit and study than having a relaxing communication. Even though it can give a high education to the native, and a very philosophical nature, they can however have lack of good teachers and gurus in life

10.Jupiter in the 10th house- Even thought all planets except Ketu gives good results in 10th house, Jupiter, too, doesn?t really feel comfortable in 10th house, especially since its weakest position in the 10th sign of Capricorn. Jupiter is about religion, spirituality, and dharma. Jupiter is like a teacher, or professor, and they usually do not like to work, but rather give lectures, sitting in their office and just study. Here, Jupiter is forced to work in place where they not only are forced to use their mind on things they do not want to think about, but are also forced to use their body.

http://www.astrologykrs.com/mercuryinhouses.html