The I Ching is a collection of practical wisdom, pertaining to every conceivable situation. It originates in ancient China and is the oldest Chinese classical text. "I Ching" means "Classic of Changes" or "Book of Changes." (While mostly the spelling "I Ching" is used, "Yijing" is in fact the official modern spelling.) It is one of the oldest surviving books in the world, and one of the oldest forms of divination.
The I Ching is, therefore, one of the oldest and most credible of the "New Age" oracles out there. Like the Tarot the I Ching provides an insight into our own Psychological attitude to our situation, providing a valuable insight into our state of mind and clues pointing to solutions we may have otherwise missed.
I-Ching is well known for it’s hexagrams and their meanings. There are 64 different main kinds of situations in the I Ching. Each one is indicated by a hexagram, which is a symbol made up by 6 lines, each of which can be broken or unbroken.
To obtain advice from the I Ching about one's current situation, one can consult it as an oracle. To decide which hexagram is related to the situation at hand, a "random" hexagram is obtained by throwing coins (or yarrow sticks, that traditionally were used). The "random" hexagram is supposed to not be random at all, but to coincide with the situation.
Hexagram’s foundation simply came from the Chinese belief of the universe’s most basic structuring principle, the axiom of yin (which is interpreted by the broken lines) and yang (which is interpreted by the solid lines). A hexagram follows the same stark juxtaposition of activity and rest, good and evil, stimulus and response, light and darkness etc as yin and yang does.