Gossip refers to doing divination, deviating from divination, changing divination into divination, changing divination into divination, and changing divination into divination.
Six hexagrams means that each hexagram has six hexagrams, which are called the first hexagram, the second hexagram, the third hexagram, the fourth hexagram, the fifth hexagram and the last hexagram.
The meaning of these two sentences is that the development process and result of things can be inferred through gossip and six classics.
Six variables is one of the most popular forecasting methods.