The I Ching, or "Classic of Changes", is an ancient Chinese oracle, one of the five classics of Confucianism, traditionally used for divination and as a moral, philosophical, and cosmological text.
It is based on a binary system of yin and yang, or negative and positive. The combination of six lines, which could be either broken (yin) or unbroken (yang) gives the sixty-four kua or hexagrams, which together make up the totality of archetypal principles. Each hexagram consists of a pair of trigrams. There are eight basic trigrams, each with specific corerspondences. The symbolic significance of each hexagram as a whole and each of its six lines is expressed in a cryptic poetic passages ("the judgment") and a philosophical commentary (the "ten wings").
The I Ching is consulted by casting yarrow stalks or coins six times to determine the appropriate hexagram and moving lines (if any).
Table of 64 Hexagrams
DETAILS OF THE I CHING DIVINATION PROCEDURE - very technical - shows parallels with DNA, etc