I Ching

The conception behind this title, thus, is profound. It has three implications:

1. Simplicity - the root of the substance. The fundamental law underlying everything in the universe is utterly plain and simple, no matter how abstruse or complex some things may appear to be.

2. Variability - the use of the substance. Everything in the universe is continually changing. By comprehending this one may realize the importance of flexibility in life and may thus cultivate the proper attitude for dealing with a multiplicity of diverse situations.

3. Persistency - the essence of the substance. While everything in the universe seems to be changing, among the changing tides there is a persistent principle, a central rule, which does not vary with space and time.

Due to the profound ideas conveyed by the title itself, it is practically impossible to arrive at an unbiased translation which could preserve the original concepts intact. The translation of the title into English used to be Book of Changes, though a slightly more accurate name, Classic of Changes, appears more frequently in recent use.

Structure

The text of the I Ching is a set of predictions represented by a set of 64 abstract line arrangements called hexagrams . Although just the numbers 1 to 64 could have been used, the ancient Chinese instead used a figure composed of six stacked horizontal lines . Each line is either Yang (an unbroken, or solid line), or Yin (broken, an open line with a gap in the centre). With six such lines stacked from bottom to top there are 2 or 64 possible combinations, and thus 64 hexagrams represented. The hexagram diagram is conceptually subdivided into two three-line arrangements called trigrams (卦 guà). There are 23, hence 8, possible trigrams. The traditional view was that the hexagrams were a later development and resulted from combining the two trigrams. However, in the earliest relevant archaeological evidence, groups of numerical symbols on many Western Zhou bronzes and a very few Shang oracle bones, such groups already usually appear in sets of six. A few have been found in sets of three numbers, but these are somewhat later. Note also that these numerical sets greatly predate the groups of broken and unbroken lines, leading modern scholars to doubt the mythical early attributions of the hexagram system (see, e.g., Shaugnessy 1993). Each hexagram represents a description of a state or process. When a hexagram is cast using one of the traditional processes of divination with I Ching, each of the yin or yang lines will be indicated as either moving (that is, changing), or fixed (that is, unchanging). Moving (also sometimes called "old", or "unstable") lines will change to their opposites, that is "young" lines of the other type -- old yang becoming young yin, and old yin becoming young yang. The oldest method for casting the hexagrams, using yarrow stalks, is a biased random number generator, so the possible answers are not equiprobable. While the probability of getting young yin or young yang is equal, the probability of getting old yang is three times greater than old yin. The yarrow stalk method was gradually replaced during the Han Dynasty by the three coins method. Using this method, the imbalance in generating old ying and old yang was eliminated. However, there is no theoretical basis for indicating what should be the optimal probability basis of the old lines versus the young lines. Of course, the whole idea behind this system of divination is that the oracle will select the appropriate answer anyway, regardless of the probabilities. There have been several arrangements of the trigrams and hexagrams over the ages. The ba gua is a circular arrangement of the trigrams, traditionally printed on a mirror, or disk. According to legend, Fu Hsi found the bā gùa on the scales of a tortoise's back. They function rather like a magic square, with the four axes summing to the same value (e.g., using 0 and 1 to represent yin and yang, 000 + 111 = 111, 101 + 010 = 111, etc.). The King Wen sequence is the current sequence of the hexagrams in the traditional book.
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