The importance of the first 10 numbers (and I include the zero too) cannot be emphasized enough. The order as you smartly suggest is not important but each and every one of these numbers represent something far bigger and more important than their mundane use of counting pebbles. The deep symbolism depicts our manifested universe from the infinity. Zero, as its shape and circular form suggests symbolizes the infinite , parabrahmam the unspeakable and unutterable g-d.
P.S. Once upon a time I used to do numerology and I still do it for friends and family for free....
0
Zero represents the monad, the indivisible unit. On the mundane plane it is the macrocosm of the whole universe or the microcosm of the smallest self-contained sub-atomic parti-cle. Zero is the cosmic or Orphic egg. It is also the Buddhist void. Quabbalistically this is the Ain Soph Aur = "Limitless Light".
1
One is the beginning, the creation, the unity. The sun has always been associated with the number one as a symbol of life and wholeness.
Astrologically the One is connected to Sun. Aries (cardi-nal Fire) sign is the first sign of the zodiac and hence related to the number one. Quabbalistically this is the Kether = "Crown".
2
Traditionally the numeral two is associated duality, sepa-ration, conflict and is a mythogem of the opposites: Sun and Moon, male and female, life and death, etc.
Astrologically the 2 is connected to Moon. The 2 is related to the sign of the Taurus, a fixed Earth sign. Quabbalistically this is the Chokmah = "Wisdom".
3
The number three represents unity through overcoming the duality of two by adding one. Jupiter is the planet of the 3 and the 3 is also related to Gemini which is a mutable Air sign.
Quabbalistically this is Binah = "Understanding".
4
In contrast to three the number four is solidity of the earth and the cube. The four cardinal points: east, west, north and south; and the four elements of air, earth, water and fire symbolize inner ordering related to psychic wholeness. The four quarters of the moon in their waxing and waning phases has always been a mythogem for the stages of birth, develop-ment, maturity and death.
Four’s planet is the Uranus and Cancer a cardinal water sign of the 4’s sign of the zodiac’s. Quabbalistically this is Gedulah = "Mercy" or "Loving Kindness".
5
The human microcosm or natural man equals two arms, two legs and a head. Mercury and Leo (a fixed fire element) are connected to the 5. Quabbalistically this is Gebruah = "Severity" or "Justice".
6
Six signifies love, beauty, romance, harmony, and balance between male and female principles. In Genesis it represents the six days of creation. The Planet of the six is the Venus while it is connected to the Virgo (mutable earth) element.
Quabbalistically this is Tiphareth = "Beauty".
7
Many mystical systems are based on the number seven. The seven Chakras from India, the ancient number of the uni-verse were the seven visible planets before the discovery of Uranus, Neptune and Pluto. Corresponding to this in al-chemy, each of the seven planets is represented by a metal: sun=gold, moon=silver, Mercury= quicksilver, Venus=copper, Mars=iron, Jupiter=tin and Saturn=lead. The 7 is ruled by Neptune and it is the Libra sign. (The 7th sign of the zodiac)
Quabbalistically this is Netzach = "Victory".
8
Eight is an infinity symbol, also a symbol for the worlds of the conscious, unconscious and the loop which flows back and forth between them. The eight spokes of the ancient wheel held the center and outer rim together.
The 8 is ruled by the Saturn and as the 8th zodiac is Scor-pio (a fixed water element). Quabbalistically this is Hod = "Splendor"
9
Nine in numerology equals the end of a nine year cycle. In human biology it symbolizes as the nine month gestation of pregnancy. It can be a time to give birth or a return to a past cycle or pattern. The 9 is ruled by the planet Mars and con-nected the Sagittarius the 9th sign of the zodiac, this is a mutable fire sign. Quabbalistically this is Yesod = "Founda-tion".
10
Numerology does not use the number 10 as any signifi-cance. In the Quabbalah it is Malkuth = "Kingdom", it is associated with the realm of matter/earth, our physical exis-tence.
As the One manifests, two do not result. Three results.
Again, when the Three manifest, in sequence ... there become Seven.
Why is each of these the case of necessity?