The number 4 is the position of Chesed (mercy). on the Tree of Life. In this decanate, Chesed refers to Jupiter who rules in Libra. Thus we have, intellectual balance and/or the idea of authority in the intellectual world.
However, when mercy is applied to intellectual thought, we have compromise, which in itself, dulls the sharpness of wit. Thus turning a clear and concise thought into a rather murky, self-deprecating thought. Such as the political thought of today. When thought is compromised to please the "many" very little intelligence is presented. Such thought represents a refuge from mental chaos (free thinking) arrived at in an arbitrary manner. While arguing for convention, one loses the invention of the individual perspective.. From such conventional thinking, we get society and indoctrination.
The Four Swords, are depicted in the image of a St. Andrew's cross, with hilts held in place by the corner-points. Thus, fixed rigidity is suggested. The large 49 petal rose represents social harmony, which has fixed the 4 swords of "pointed thought", into pointlessness, supporting the theme of this card of compromise.
First and foremost, there is no Truce without conflict but conflict is not over because of True. Rather, it is a temporary fix at best, and will soon shake apart from the strain of holding the tension in compromise. We have a perfect example of this in our Korean Truce between North and South Korea, the war isn't over due to compromise...it's just waiting to ignite again. As Alcester Crowley so eloquently put it, "Minds too indolent or too cowardly to think out their own problems hail joyfully this policy of appeasement." [Book of Thoth] .
Because the number 4 represents the manifestation of things, the Four of Swords-Truce, also represents ,"the strong man armed, keeping his house in peace." The very nature of Air (combination of Fire-Will and Water-emotions) makes the action of Truce dominate. Thus we have Truce, held by threat of violence, rather than an intelligent conclusion to a problem. That is why the back ground of the 4 of Swords is a chaotic mix of fractures, rather than an established geometric formula. Truce may sound like a good idea, but it is only a temporary avoidance of a problem rather than a fix. The term for this in our modern society would be, "Truce is just a band-aid, not a cure.".
When the Four of Swords is thrown during a reading, the querent has been or will be experiencing for the next or last 4weeks or 4 months, a period of convalescence and recovery from sickness; a change for the better. After having gone through sorrow, there is rest; Peace after war and a relaxation of anxiety. There may be quiet, rest, and peace after a struggle.....yet the struggle isn't solved and will require a revisiting in the future. The where and when of that future visit will be shown in the accompanying cards, as well as whether it is a ill defined or a well-defined visit.
Thank you for your interest and comments. May you and yours live long and prosper!