I Ching
Interpreted by wu wei

Holding Together

Lines next to each other hold together if they are different and do not hold together if they are the same. The most important of these relationships is that of the fourth and fifth lines, the ruler and his minister, and the best condition for those two lines is when the ruler is strong and the minister weak. The line on top is said to "rest" on the line below, and the line below is said to "receive" from the line above.
If a divided line "rests" on an undivided line below, the divided line is well supported. If an undivided line "rests" on a divided line, the support is weak. If a divided line "receives" from an undivided line above, the divided line is benefited because of the strength of the undivided line. If an undivided line "receives" from a divided line, the undivided line is not usually benefited because of the weakness of divided line. This is a general rule and departure from the rule will be stated in the kua.