Mercury has attractive physique, power of speech or oration and sense of humor. It is fond of fun, frolic and sports. Mercury is very intelligent and learned. this planet signifies wisdom, intellect, speech, memory, education, short travels, intuitive power, and occult sciences. It indicates one's mentality, analytical power and generous nature. When Mercury is aspected by Jupiter or Venus, it makes one scholar and searcher of mysticism and learning and ambitious of being exquisite in every science. With a strong Mercury in the birth chart one becomes sharp and witty and it indicates a subtle political brain and intellect and a logician.
Mercury is the lord of the signs Gemini and Virgo. It is exalted in the sigh Virgo at 15 degree longitude and it is debilitated in the sign Pisces at 15 degree longitude . Sun and Venus are its friends. Moon does not treat Mercury as its enemy but Mercury treats Moon as its enemy. It is neutral to Mars, Jupiter and Saturn.
If Mercury is strong and well placed in the horoscope then the native gains knowledge, high position, happiness through spouse and children, prosperity and leads a happy and contended life.
If Mercury is weak and afflicted in the horoscope then the native will lack confidence, remain nervous and have skin diseases. There may be break in education. The native will be betrayed by close associates and will distrust everyone. The native will be in financial difficulties and there may be loss due to thefts.
Parts of the body ruled by Mercury are brain, tongue, nervous system, thyroid gland, skin neck and power of speech.
Diseases caused by Mercury are dumbness, insanity, loss of memory, headache and skin diseases, fits, small pox, plenty of bile and phlegm and wind in composition.