When a person has his natal Mercury in the 9th house of the chart, the placement makes him be of a rather high intellect, being capable of viewing the big picture. His mind is very broad; on the other hand he can lack the ability to see thoroughly the details.
The 9th house is ruling everything that is foreign, and Mercury placed here will definitely make the native learn foreign languages and have a rather different mentality and philosophy than the rest people residing in his homeland. He will be also influenced by foreign cultures and religions, mixing them with the ones he learnt as a child and creating his personal one. His fascination with foreign traditions and people will lead him to a lot of distant travels, especially if the Sun or Venus are also present near his natal Mercury.
This placement is the best for writing and publishing, and the individual may be involved in writing about philosophy or religion. Such a person adores researching and is a life long student, mostly of abstract subjects as the ones already mentioned. This helps him develop a higher view on these matters, and his observations can be later transformed into texts of a rather good quality. Curiously enough, one of the reasons that urge him to study is a strong dislike of routine, boredom and shallow meanings; thus his mind is pressing him to open his horizons through learning in order to not fall in depression. People with natal Mercury in the 9th house can be information junkies, love to research encyclopedias and will frequently open 20 tabs of Wikipedia in their browser. The native’s sense of curiosity is very strong and can lead to profound discoveries.
Of course, this placement has also its negative traits concerning learning; the native does not concentrate on one particular subject and is multitasking while learning. Due to this fact, he will know a lot, probably on nearly every subject that exists, but does not have the time or the will to become deeply specialized in something. Nevertheless, this is usually a conscious choice; becoming specialized in a certain subject will make him bored and he will most probably quit such type of attempts.
As the 9th house is ruling higher education, Mercury here can indicate becoming a teacher. The native has quite a lot of possibilities in progressing as an academic professor; on the other hand even religious preachers and gurus can also have this placement. Mercury in the ninth gives a tendency to try to inspire other people, and if afflicted by planets in the 1st or the 12th house may signify an over-inflated ego that needs to mentor people in order to feel pride. An other personal trait to guard from is being a smart-aleck; people who have such a natal Mercury are susceptible to showing off and all types of Luciferian attitudes. Exercising modesty is a great tool of progressing; through such practices the native understands even better his own value.
These patterns usually start with a rebellion towards the native’s teachers and parents during childhood. The youngster observes the broadness of his own mind, and discovers that he can learn information that elder people are unaware of. He then uses it as a weapon to counter the knowledge that the elders have, usually without understanding that knowledge dwells in experience and not in the details. With heavy afflictions of Mercury, the young child will frequently hassle his teachers and parents, in an attempt to show that he is smarter than them. These, of course, usually fail; yet such failures become a motivation for further learning as the individual does not like losing and will want to revenge and prove his right. Even this wrong and negative procedure can have a great outcome in his life, as the native gradually self-educates, without understanding how much he invests in his future.
If Mercury is adversely afflicted by Mars or Pluto, the native should be careful not to become dogmatic. This placement can make him enforce his own ideas to other people, and even if these ideas are correct and precious he can become highly disliked from others. In case you have such afflictions to your Mercury, understand that your ideas might be correct for yourself but not necessarily apply in the same way for other people. Be a little bit more open towards understanding other points of view and accepting what you feel more correct than your own; you will be later rewarded by upgrading and structuring an even better philosophic model of thought than the previous you had.
Mercury in the 9th house is also a very good position for people who study and exercise the law. It can create lawyers and judges, while also religious people or priests that may have authority positions in certain countries or cultures. Do not forget that even in our days, there are places on Earth where the priest is exercising justice on the people. In case that you have this placement and will be somehow involved in religion, investigate thoroughly the personal reasons hiding behind that choice. If they still contain egoistic traits and the need to have an authority, you are not ready. You will be eventually, but better try later.