Don't leave home without your sword - your intellect.
The King of Swords is logical, fair, just, and stern. He is detached and objective, holding law to the highest regard and as such is incorruptible. His appearance in a reading suggests that you remain emotionally detached so that you may make the most of your logic and intellect.
Be wary of the Inverted King of Swords, for he represents someone who is misusing his power. He is cold and calculating, although he may appear as charismatic and knowledgeable. His only real goal is his own self-interest and he does not care what harm he does to others.