Summary: You may feel more intelligent and alert. It’s a good time for communication, but be aware of potential nervousness and distraction.
This interpretation is for when Transiting Mercury is going through your natal first house.
Your personal reactions are accelerated, and you give the impression of being more intelligent and alert. The characteristics of this transit of Mercury are: increased curiosity, intellectual self-confidence, self-expression, as well as ease in the communication of ideas. There will be some intellectual competitiveness in communication with neighbors, friends and co-workers and a tendency to make short trips on topics related to work or matters in which you have an intellectual interest.
This transit is also wonderful for lecturing, writing, teaching and studying. There will probably be communication about the improvement of work methods. During this period you will become more aware of your personal appearance and think more about your personal goals, and how to project your personality outward, including a concern for the way you dress, diet and hygiene.
If Mercury makes difficult aspects, it causes a tendency to become nervous and agitated, and even arrogant, to feel that you know everything. In general, the mental process will be affected, causing you to be easily distracted by disturbances in your environment, and you may speak a lot about trivial issues, affecting your efficiency at work.