You've got a razor-sharp mind that doesn't miss details but your best mental strength is the ability to see right to the heart of the matter without getting distracted by meaningless information. You've got a keen ear, and the ability to discern important facts from superfluous fluff. Investigation and research are tasks that come easily to you, along with your intelligence, nose for the news, and ability to ask the right questions.
'Research' can quickly develop into obsession; you must be very careful in this regard. You can easily get carried away with an idea or person, spending many hours a day brooding and stewing. You have strong convictions and stand up firmly and eloquently for your beliefs. In fact, your speech is so powerful that others may consider you overbearing. Nonetheless you speak with great authority and such persuasion that in general, people listen to you. You can speak like a politician, or a preacher, convincing others of your viewpoint simply on the strength of your belief in yourself. Cynicism is a danger for you, as is always looking on the dark side of things. But healthy skepticism on your part keeps you realistic.