Mars rules Aries. Mars is energy. It is the kind of energy that your body uses to contract muscles, to assimilate food, and to fire synapses in the brain. It is the kind of energy that makes gasoline burn, pushing pistons up and down, thereby moving your car. It is the dynamic energy of all action in the material world.
The god Mars was responsible for two distinctive kinds of energetic activity: He was the god of war, going around sowing terror and fear in the enemy and inspiring courage as well. On the other hand, he was a god of agriculture, encouraging the planting and tending of crops, and even encourage the crops themselves to grow.
The sign and house of Mars show where your personal energies tend to go when you are not guiding them. It also shows where you can concentrate your energy through decisive action for the strongest results. There is a certain reckless quality to Mars. This planet has to do with sharp instruments and vigorous force. We need to understand this planet in order to manage energy well, or it can become angry and destructive. Thus reading about Mars in your chart can provide answers to your questions about why some situations may have turned out badly, and how to use your physical and emotional energy more successfully in the future.
Mars is also the planet of desire. We all tend to use our energy to get what we want when we want it. Desire is a good thing, because it impels us forward to something new and better. It helps us to find partners and mates. It helps us to find satisfying food, clothing, and shelter. On the mental level, desire helps us to choose an area of study, to select books or movies we want to experience. On a still higher level, Mars indicates the direction of our spiritual passion. It shows what religious or spiritual path will satisfy our desire to understand the universe and master our own actions.
The aspects of Mars in your chart indicate the directions in which you can most easily direct your physical, mental, emotional, and spiritual energies. Understanding Mars helps you to direct your actions to gain the best results.
SOURCE: What Astrology Can Do for You, Stephanie Clement