Mercury the planet of intellect, represents intelligence as well as communication of all kinds. It has a quickly changing and fickle temperament and being the lord of Gemini, can exhibit dual nature. It may make a subject detached and independent, or an extremist. It is known as a “mutable planet” in that it reflects the attributes of planets it is associated with, being a “neutral” planet. It is representative of education and literary affairs and the communication of ideas, such as in advertising, sales lecturing or teaching spiritual concepts. Its full effects are seen between the ages of 32 and 35.
Writers, lecturers, artists, sculptors (or people that use their hands in their profession) and teachers, as well as astrologers, accountants, office workers, traders and businessmen, more often than not, will have a prominent or well-placed Mercury in their charts. Playfulness, enthusiasm and talkativeness are the traits of Mercury’s influence, in addition to independent thinking and appreciation of tradition. The ability to learn different languages, convince others, memorize and develop good business acumen come under Mercury’s influence. Friendships and ability to learn things are due to Mercury’s energies. It gives proficiency in the arts and the ability to do things quickly or several things at one time.
Mercury is the ruler of the signs Gemini and Virgo of the Zodiac and becomes exalted in its own sign of Virgo. It is debilitated in Pisces. Mercury is friends with Venus, Sun, Rahu and Ketu, neutral to Saturn, Mars and Jupiter. It is enemy with the Moon but does well in the birthstars of Ashlesha, Rohini, Revati, Jyestha, Shravan and Hasta.
A strong Mercury gives good intelligence and myriad of abilities under the categories mentioned above. Successful communicators of all types have a well-placed Mercury in their horoscopes, whether they be artists, business people, in the entertainment business, or involved with the media.
A weak Mercury may make subjects restless, fearless, fearful or neurotic. When Mercury is ill-placed or aspected, it may cause lack of intelligence or communicative skills, or a poor memory. It can make a person immature, foolish and childish. Feelings of insecurity and lack of self control, leading to addictions and artificial dependencies, are also manifest from a poor placement of this planet. Physically it can show itself as weakness of the nervous system, anxiety, neural indigestion, or insomnia. It may cause bowel and elimination problems such as diarrhea or constipation, difficulty in digesting food, kidney disease, or respiratory problems.
Malefically disposed, it causes sufferers mental or physical pain, or undue anxiety. This may vary from being too fearful and nervous to having serious psychosis and lunacy.
Jupiter’s wife, Tharai, was impregnated by the Moon during an affair. After resuming her relationship with her husband Jupiter, a son was born. Tharai confirmed that the Moon was the real father. This was again confirmed by Lord Brahma, who made Mercury live close to the Sun. Mercury performed penance to Lord Shiva and was granted the boon of becoming a planet.