The planets are the most important component of the language of astrology. Every sentence in the language of astrology must have a personal planet as the subject. That’s not a problem if you have a question about identity (Sun), or safety (Moon), but what if you want to know about your job or your money?
Those aren’t questions with a connection to specific planets: they’re house-based questions. You can’t have a house as the subject of a sentence in the language of astrology, so you turn to the planet that rules the house. That planet can become the subject of a sentence and answer questions about the affairs of the house. In terms of grammar, the planet is a virtual pronoun, standing in for the house itself. This creates a different context for your interpretation.
