The placement of Mars in Aries indicates that you have a need to feel that you are being sufficiently assertive in pursuing your desires and taking action. At the base of this feeling is a need to validate your sense of selfhood by acting in the world and, thus, gaining tangible proof of your existence. Much of the behavior and many of the personality characteristics associated with Mars in Aries are a result of this very strong will to act.
Mars is at home in Aries. This is symbolized by the rulership of Mars over Aries. Aries is the Cardinal Fire sign. The fiery, active energy of Aries symbolically stimulates the functions associated with Mars, bringing these functions into their element. While the Martian energy gains full expression in Aries, there is the danger, however, that you will over-indulgence those functions that are symbolized by Mars. This is symbolically represented by an overabundance of fire energy in this combination.
Mars also symbolizes the animus in the psyche. Thus, if you are male with Mars in Aries, you are likely to model your masculinity in order to incorporate characteristics typically associated with Aries. If you are female, you are likely to be attracted to someone who projects or embodies Aries-associated traits.
Insecurities
With Mars in Aries, too insecure in your own selfhood to consider others, you forget all but your ego and its needs. Your desires and actions are selfish and ultimately destructive. Subconsciously fearing retribution for the “original sin” of ego (which is symbolically freshly born in Aries), you defend yourself against a hostile world by preemptively taking a “me-first” stand. This over-assertiveness, however, only masks the weakness of your insecure ego.
Mars in the 2nd House:
Mars in the 2nd House suggests that your desires and actions are practical and generally aimed at enhancing your physical security and material comfort. With Mars in the 2nd House, you may concentrate your actions on acquiring those things that are desired by you because they are valuable and useful. You may desire a great many possessions because having things may tend to make you feel secure. If this is the case, the first priority in most of your actions may be to establish a level of comfort and sufficiency.
Having Mars in the 2nd House, an underlying question posed before taking any action may be, how will this affect what I have? Thus, if you are continually seeking to protect yourself from loss or possible want, your actions may become risk adverse so that your actions are for the most part cautious and conservative. With Mars in the 2nd House, when you feel that your physical security or comfort is threatened, however, you may be very willing to take risks or act aggressively in order to protect your possessions.
As an individual with Mars in the 2nd House, your value system may not be so materialistic, however, and, if this is the case, then your desires for material security will not bind you so much. In fact, given an idealistic set of values, you may be willing to risk much and act with courage to achieve your ideals and actualize your values.