The planet Mercury is considered a neutral and normally a benefic planet in Astrology. Mercury is the prince planet after Sun and Moon. Just understand a person needs power, authority (Sun), mind and physiological balance (Moon) and Wisdom (Buddhi) to use both these basic traits to be successful. Mercury is the most important planet after Moon for a person's inner strengths/weaknesses. Mercury is also known as Budh (Buddhi), or your wisdom. If Moon is your mind and emotions, Mercury makes you use it.