The individual human being can be looked at in many ways. One point of view holds that the human psyche is comprised of three spirits. There is balance amongst the three to provide a whole or natural experience. The three are male, female, and child. Any one individual needs to develop these and keep these three spirits in balance. As much as Eastern thought dwells around the Ying and Yang, there is also the play between the two, creating a third. The parallels are interesting.
I find myself most "whole" when there is a sense of all three (male, female and child) present. I find myself most "out of balance" when one of the three is dominant.