Listen now (17 min) | Today my podcast is about Mercury in Pisces and all I have to say is, welcome to my world! Mercury rules the sign of Virgo, where it is also said to be “exalted.” This is because detail-oriented, rational and exact Virgo perfectly fits what Mercury wishes to do. Mercury rules language, verbal and written communication, rational thought, commerce and any sort of “messenger” system, like e-mail or the post office.