If overdeveloped, the individual becomes bossy and pushy, pompous and vain. Greed and extravagance are also exhibited. The individual enjoys wielding power for egocentric ends. This individual will find it difficult to make and keep rewarding friendships, as their ego will often countermand the truly generous and attractive traits necessary for perpetuating the friendships. Instead, the friends of such an ambitious person will often find themselves as mere tools of their ambition, and if the bearer lack positive markings on the mount or a well-developed mount of Mercury, this reality will be glaring indeed for his friends, for the bearer has not even the tact to attempt to conceal or soften their utility. All of the above traits are accentuated if the finger of Jupiter is long as well.

An underdeveloped mount of Jupiter will bring a lack of confidence and drive resulting from feelings of inferiority, and as such, the bearer may be easily manipulated, trusting not their own leadership instincts, but those of others who are more assertive. They will also lack drive and wallow in idleness (89).

Marks:

• At times, there is a ring around the base of the finger of Jupiter. Unlike the ring of Saturn, this ring is almost always a positive sign. It is known as the Ring of Solomon, and typifies a rejection of the world and material values, coupled with heightened spirituality. However, if the mount of Saturn be largely developed, this combination could result in religious zealotry. Many, however, do not have the complete ring, though they still possess some of the ring's characteristics: they are not as interested in money and possess a keen and insatiable philosophical mind.
• Transverse lines on the mount will weaken both ambition and confidence.
• Vertical lines on the mount will enhance its positive qualities. If there be many, however, the bearer runs the risk of being divided in purpose and hence will be unsuccessful (93).
• A grille on the mount of Jupiter serves to dissipate the benevolent qualities of the mount, leaving only the lusty hunger for power and indefatigable ego in its wake. This, the Greeks called hubris, a great pride that was the undoing of the protagonist in the end (176).
• A cross on the mount of Jupiter is also an uncharacteristically good sign, as it portends a successful and happy marriage.
• A star on the mount will bring many successful and distinctive people into the social sphere of the bearer, yet without further signs collaborating success, that is the extent of their success: to have known the kings but not to be one.
• An island is never a sign of benevolence. In this case, it represents an "ambitious career, ruined by the mad actions of a relative or close friend (96)."
• A square will protect the bearer from growing overly ambitious.
• A spot is a symbol of ruined position and a loss of fortune and reputation.(3.94)
• Little information could be found on the meaning of the very rare occurrence of a circle on the mount of Jupiter. The only reference to such a marking was from Comte C. de Saint-Germain, who reported it was a sign of "great success."(95)
• A triangle denotes success as a supervisor and handling of every-day affairs. These qualities are owed to the mount because it brings with it a great sense of tact and diplomacy. It also portends a mature mind, honesty, and an upright nature.