In the "what to do" position is the VIII of Swords. I don't have any information about this particular card (does anyone else out there?)
But about Swords in general, this is what's written: Swords are part of the element of air. So, naturally, they are in the realm of Jack (I assume knives are a subset of swords, don't you think?)
The key principle is the mind. The sword has always personified judgement and the ability to arrive at a decision and to carry it out. A sword assists in the act of Penetration, separation, and definition. In addition to the concept of war, think also about chivalry, responsibility, and freedom, other attributes of the sword.
When a sword card is drawn, it is a signal that clarity is needed, good air, strong "breath", the human condition, stars, and (as Shakepeare said) "there are more things in heaven and earth than we can imagine." Between heaven and earth there is also open space, as Annie Proulx wrote.
