Lets try to explain some of the Tarot Major Arcana cards, using Five Arts terminology.
Here is nice image(someone made it some years ago, no idea who, but can't find it in the net now). Based on a book I've mention before. Long story there and we will skip it for now:

If we look at the 3 Pillars(left, middle and right) we can see left and right pillars each carry 3 circles.
So there are 3 sets of circles, lower, middle and upper on the left and right all named on the image.
The circles are called Sephirot, plural and Sephira when singular.
Lets look at the middle 2 on the left and right.
One is marked in the image as Mercy and the other is called Severity.
Someday when the app is out there is more info on that, but Severity is called Jue Ming in the Five Arts, 8 mansions context, while Mercy is called Six Killings.
In Kabbalah Mercy is called Chesed. That means kindness.
Severity is called Gevurah, sometimes also called Pahat, meaning Fear.
So the idea here is that is human level. That is Qi level. Lower is Jing(essence), upper is Shen(spirit) and this is Qi.
The base polarity here is between Gevurah and Chesed. Severity and mercy, fear and kindness.
Practitioners of Kabbalah used to wear a cloth around their right hand. The reason for that is to withhold severity, as somehwere along the way, similar to Five Arts practitioners when looking at Jue Ming, they realized it was the most harmful influence for complex reason.
And that is basically the Human part of the "influences", with Heaven at the higher 2, and with Earth at the lower 2.
Since we are looking at the 8 houses, we can also already say that Gevurah is carrying Images of Metal.
We can write a lot more here, but lets go back to the cards. Justice is the card that carries the path from Gevurah to Chesed.
So if we want the middle Dan Dien to be in balance, we need "judgment".
Its interesting that Six Killings is viewed as something bad in the Five Arts. However, we do agree with the overall assesment, and while there are changes and nuances, and more practical stuff, our explanatation has 2 parts. One is for later, the other is that Six Killings is viewed as bad, because too much openess to people(espesially to strangers) can shake a family. Then Gevurah is needed(severity/fear) and it goes back in balance.
Looking at the card Judgment, that is on that path, that judgment, how open to be with people, when severity is needed, when it has to be avoided etc. that is playing with this polarity Gevurah/Jue Ming and Chesed(Six Killings).
Too open, and one will get experience aimed at closing them a little(fear usually), too severe and one will get all sorts of problems from being alone combined with more, from the whole influence being broken(long story there).
So that is Judgment. Its how open to be with people, mostly. Although all on middle dan dien"qi level" is basically same category of judgment. : )
The biggest problem in the Five Arts, in my humble view, is the way they use severity. Its not suppose to be used in tha strong way, that is like empowering the Jue Ming sectors of the house. Its not very healthy.
Of course, some aim to get authority with Severity, and here the name "Pahat/Fear comes into play". Equally unhealthy, however, as the price is too much for any authority gained, in most cases.
When we get it in a reading, it basically means one has to adjust and figure out how open they have to be, often with other people. Can also be warning one is too open, or too severe/closed. Adjustment may be needed.