The four Nines are attributed to Yesod (Foundation) and after the double incursion into misfortune the energy current has returned to the middle pillar. Balance is restored and energy has crystallized to form the foundation of all things. Yesod is in direct line with Tiphareth (Beauty-the Christ Sephiroth) so it has a direct line of succession and manifests the full force of the element. Zoroaster said," The number nine is sacred, and attains the summit of perfection".
The Nine of Wands is called STRENGTH and is ruled by the Moon and Yesod---it is Strength in Change. Sun above (Tiphareth) Moon below (Magnetic womb of Form) forms a balanced flow from God (idea) to Goddess (Form) Of all important doctrines, this is the easiest to understand; change is stability; stability is guaranteed by change and if everything stopped changing---even for a second, everything would cease to exist. Energy can only keep in motion, by transforming continuously. It is the intense energy of atoms, electrons, protons and molecules. Change guarantees the order of Nature. To those of astrological bent, the Moon is known as the weakest planet and Sagittarius as the most elusive. So in this case, the 9 of Wands strength is in mobility, which is the greatest defense at keeping destruction at bay.
The Nine of Cups is called HAPPINESS and is ruled by Jupiter and Jupiter is known as good fortune. Happiness implies luck. However, Jupiter is in Pisces, a watery sign, which is based more on a certain element of illusion. Like the illusion of Romantic Love, it is more like a "dream within a dream". Being ruled by Jupiter does bring good fortune here, but it is based more on satiety stating that the fullest satisfaction begins the next putrefaction .....change brings stability to motion. Absolute rest is an illusion.
The Nine of Swords is called CRUELTY, and is ruled by Mars in Gemini. This is agony of mind. In the 9 of Swords, the disruption natural to Swords, is at its highest peak. There is the analytical activity that is normal in the mind, but the understanding that it won't achieve anything anyway dulls its edge. It is Self Cruelty, where we doubt our ability to do anything well, for all has been well thought out and has not succeeded, but we still are stubborn enough to continue on.
The Nine of Disks, is GAIN.. It sounds very good, but we must remember that energy in the form of matter is too dull to care. it counts up its winnings, and does not worry its head whether anything is won when all is won. Here the state of mind is "all is great in the World" and no thought of future. This card is ruled by Venus, and it purrs with satisfaction over harvesting what it has sowed which is not interfered with by reaction to satisfaction, as in the other three suits. Feel good about the gain, but remember that Change is Stability and not bound up in thoughts of permanency, that is the failed thought of a Miser. Wealth becomes prosperity, when it is spent- shared with other people...change is stability!
Thank you for your interest and comments. May you live long and prosper.