The Ace represents unity considered as a departure and as a synthesis summarizing the meanings of the 9 consecutive cards.
The number 2 is the symbol of passivity, of polarity, and of the elements of gestation. Through passive polarity, it is without effect, but through gestation, it is the material of all things that develop.
The number 3, through 2 + 1, introduces an activity in the passivity of 2, which gives directions to the gestation.
The number 4, produced by 2 x 2, contains a crystallization and, as the intermediary between 3 and 5, a transition. It represents therefore a relative state of stability and, consequently, things which are ordered and tend towards a consolidation of themselves, towards security.
The number 5 is a number of transition, the passage from one plane to another, because it is composed of 4 + 1, 4 being a complete number. to which is added a unity, which is to say, a beginning. The base 4, which is built up in order to engender the following number, gives it a sense of multiplicity and diffusion through influence.
The number 6 represents a harmonious balance, as it is formed from 3 + 3, or two ternaries which are in opposition to each other, and from 2 x 3, implying a similarity between these two ternaries, and, consequently, their equilibrium. In its elementary sense, it signifies a latent power, a potential, which is to say, reserve on which we can draw.
The number 7 = 6 + 1, indicate, through its union, force, action which uses the power contained in 6. It puts it in play, while maintaining its harmony, so that it indicates successful completion. It is a number of synthetic achievement.
The number 8 = 4 + 4 brings unity to the combination of the cross and the square, which is to say, the stability of the material plane with the interior life of the divine plane. This is not an abstract equilibrium, as that of 6, but one which marks an end, because it has no need of being animated through other currents. It is the symbol of infinity, as it is formed of two adjacent circles which, tracing in one direction, develop each other indefinitely.
The number 9 represents the orientation of the abstract towards the concrete. The previous 8 numbers indicate material animated by the divine; when taking 9, which is 8 + 1, one obliges 8, which is perfect, to take on one unit more, which is to say, an entree to action, thus to describe a new cycle, one which implies a new penetration of force into matter, like the one which is accomplished when the universe, virtually conceived, is realized in matter to make its experience evolutionary.
While 1 synthesized in their principles the numbers from which it began, 10 condenses them within itself, because it participates in each of them through its 0 which connects them in potential and directs them to a new cycle by the 1 which accompanies the 0. It is, furthermore, the number of reason and of calm, since, when it is with 9, the abstract was making contact with the concrete, by 10, it is now in equilibrium in the physical, since 10 = 2 x 5.
The Minor cards stop at the number 10 because if they were to go beyond this number and arrive at 12, which is an outcome, they would no longer have a link to the physical and they would remain inaccessible to human understanding.