The 12 Houses of astrology are symbolic of the all the departments that make up human life. The planets and zodiac signs will manifest themselves most strongly in the sphere of life represented by the House in which they fall on your chart. Houses are not "energies" like the elements or planets, nor do they color the expression of energies like the zodiac signs do. The houses are WHERE these energies are most likely to manifest. The houses are the fields of experience, not the experience themselves.
The Ninth House is commonly referred to as the House of Philosophy. In keeping with that theme, it's our search for meaning which is the focal point here. By virtue of exploring our world, we start to grasp everything that is available to us. It all boils down to understanding: understanding that which we see and feel and probing further in the hopes of realizing true meaning.
Through higher education, we have the hope of understanding concepts and theories which will enhance our world. Whether it's philosophy or psychology, the Ninth House reminds us that we are on a voyage of discovery. Along that road, we will come face to-face with our ideals and further shape the ethics by which we live. Another approach to clearer meaning and understanding of that which we see, and more importantly, that which we do not see, is through religion. Understanding and accepting that which is greater than us and our world is key to the Ninth House.
Sadly, we might not always be humble in the face of what we have. A concrete understanding of the possibilities in life may well lead to ruthless ambition and greed and an over-expansion of the self. To face these demons most effectively in society, we institute laws. These laws provide for the orderly and positive growth of that society. In much the same way, philosophy and religion help add focus and purpose to a productive society. How members of a society relate, and knowing and respecting the laws by which they live, are core tenets of the Ninth House. The way in which we expand our inner and outer lives is also addressed by the Ninth House. Travel and interaction with other peoples and cultures are a means to this end. Our dreams, those which illustrate our past as well as those which speak to future events, also help to mold our being and our relationships. Taking this a step further, psychics as the bearers of relevant information also come into play.
Additionally, the Ninth House addresses publishing and multinational ventures such as import/export businesses. This House also has a multi generational view, taking into account grandchildren, as well as in-laws. At the end of the day, however, the Ninth House is best described as philosophically inclined in the search for meaning and truth.
The Ninth House is ruled by the Sign Sagittarius and the Planet Jupiter.