The Channel of Transitoriness joins the Throat centre to the Solar Plexus centre through Gates 35 and 36, and both of those numbers are borrowed. They are positions in the King Wen sequence of the I Ching, the Chinese divinatory classic whose sixty-four hexagrams Human Design maps one to one onto the sixty-four gates of its bodygraph. Read as I Ching rather than as Human Design, the two numbers name two independent oracle texts.
Hexagram 35, Progress (Jin). The sun rising over the earth. It is advance in the light, the loyal prince rewarded with horses and received three times in a single day.
Hexagram 36, Darkening of the Light (Ming Yi). The light sunk beneath the earth. It is injury in a dark time, and the veiled persistence of Prince Ji, who kept his inner light alive while showing none of it.
The I Ching itself never sets these two hexagrams in a pair. Each stands alone in the sequence, consulted about a changing situation and answered in counsel that passes. The pairing is a construction of Ra Uru Hu's system, published from 1987, which fixes each hexagram to a position in a birth chart and reads the joined pair as a lasting trait of the person. The correspondence of number is real, and both hexagrams can be followed into their own entries in this atlas; the pairing, and the character read out of it, belong to the modern system alone.