The Knight of Disks represents the fiery part of Nature. Related to the phenomena of earthquakes, mountains and gravitation but also to agriculture and the activity of Earth that produces Life. In this case the heavily Armored Knight has his helmet thrown back, indicating a more placid state rather than violence. In his hand he carries a flail which is used in thrashing grain. His horse has all its feet on the ground, rather than the leaping horses of the Other Knights, and is nibbling the grasses. All of which point towards a solid standing in nutrition, which the Disk/Shield represents,and the Earthly activity of producing Life. This is the physician, the healer, and the farmer. A solidly natural personality who rides through fertile land.
This personality type tends to be heavy, dull and preoccupied with material things. They are laborious and patient but show little intellectual grasp of emotional matters, even on matters that concern themselves. This Knights success is mostly instinctual and/or in imitation of Nature. Though he may lack initiative, he has the deep smoldering fire of Earth that produces growth.
In the happiest cases, This Son of Soil's earthy qualities will be directed towards romance and material imagination but can be ill defined as over-whelming ambition, superstition, and idle . dreaming. Also churlishness, jealousy (dull sort of way) of the Active minds around them which often keeps them stupid in the sense of lack of foresight even in their own affairs. Such an ill dignified personality will find meddling about in petty matters to be their expertise, and they will spoil whatever comes their way.
The Knight of Disks rules from 21st degree of Leo to the 20th degree of Virgo and is thus concern greatly with agriculture. This puts Mercury in Virgo which implies Intelligence; a cleverness that is very Natural in the animal world. This "Salt of the Earth" personality is very complex but well knit and if their contact with the Earth is a healthy one--such as agriculture provides, or a Medical Doctor or Herbalist, this is usually a well-defined persona. However, if they are forced into a world of Technology, or imaginative stretches beyond instinct, they tend to be ill defined.
All in all, The Knight of Disks, is a slow, stalwart, dependable, person of good physical strength and health. If the Reader is using a Celtic Cross pattern in their reading, and this card falls in the 4th position ("What is beneath you") this can mean Earthquakes or mountainous obstacles are to be encountered by the querent. But again, this depends on the surrounding cards (especially in House and Home--the seventh position especially so if a 7 of Disks is there.) otherwise, good health, good food, and a good physician are represented. If the Knight of Disks falls in the 7th position of House and Home, we have a masculine stalwart, dependable, Romantic presence in the querents life. Lots to study..thank god for the joy of learning! Thank you for your interest and comments. May you live long and prosper!