Dignitaries and Rulerships

Each planet rules one or more signs.
In these signs the planet easily expresses itself.
In its detriment, or opopsite the sign of its rulership, the planet has the most difficulty in expressing itself
Each planet is exalted in one sign.
In the sign of its exaltation, a planet generates its power from the nature of the sign.
In its fall, a planet is weakest and most ineffectual. Here the planet is the most difficult.