月 The character/ideogram means "moon; month." The individual character means, "moon; month."

In the ken-po goku-i reference is made to the moon. The moon can be thought of as a cup that fills with ambrosia, is emptied, and then refilled. The moon sends down the dew, the ambrosia, the drink of immortality that refreshes life. The moon is in a constant state of emptying and refilling; you see it fill every month, and then unload its ambrosia on the the Earth and to fill again - the cycles of the moon each month.

The moon is in turn a symbol of death and resurrection, the eternal recurrence. This also symbolizes the Chinese cultural model of the yin-yan which is also in a constant state of change from one to the other, the yin to the yang and back in a never ending cycle. 

Ken-po Goku-i: "A person's heart is the same as Heaven and Earth while the blood circulating is similar to the Sun and Moon yet the manner of drinking and spitting is either soft or hard while a person's unbalance is the same as a weight and the body should be able to change direction at any time as the time to strike is when the opportunity presents itself and both the eyes must see all sides as the ears must listen in all directions while the mind must grasp all the tactual data not seen on all sides and not heard in any direction."