This is the house of Secrets, it is also known as the house the instinct, dreams and the unconscious. And as you guessed, it has those names because those are the areas where this house thrives. The 12th house is ruled by the planets Jupiter and Neptune and this is one of the most dangerous houses as it is here that we find the deeper levels of our mind. It is the final house in the zodiac wheel and deals with the unseen realm, our inner world and unseen aspects of our lives.
Although the 12th house is often overlooked as insignificant, that is only a misconception, we must know that the unconscious rules the conscious, and this house helps in the process of positive transformation, it brings us face to face with the consequences of our past actions, even the ones that no one else knows, and bends us to look toward the future with growth in mind. Pisces rules this house, however, the various planet have their effects in this house as well. The sun may cause you to either suppress your self-expression or transform you through subtle and creative self-expression depending on where the sun falls.