Another aspect about the Yi jing is that of number, Shu. Number takes on a different role besides being a counter, it is both part and whole. It is a summation and an expression. It shows form and particular. It is used as a qualifier, either for position, direction, and even structure. It can designate type.
One can stand for the great unity of all things. I can be the source, the origin, the unfathomable, the singular.
Two can stand for duality, division, coupling, polarity, doubling, copying, mirroring, and many other things.
Three can be the intermediary, the midpoint, synthesis, birthing, a child, multiplicity, and branching. It can be the union of two or its division. It can be the beginning of a plane or an interlocution.
As you can see the picture there is more to a number than meets the eye.
With number comes time or timeliness, Shi. Whatever the function of the operand, number has a result, out of that result is a probability, a permutation. Timeliness, points the direction toward a favorable or unfavorable outcome. As you learn sequences, or sequences of events, you are more certain as to how they are going to turn out. In the most auspicious sense, you would like your outcome to be for the better, not just for yourself but also for others. Shi, is arrival and leaving, it is staying or dwelling or waiting for proper conduct. It is whether to plant seeds or to harvest fruit. It is to arrive on foot, or in a carriage. Shi is an order of time, a pattern of cause and effect, an overall theme, where you can spontaneously act for the better.