This is very cool image ...

Yin, Chinese for “female” or “moon,” represents darkness, femininity, passivity, and the earth. 

Yang (“sun” or “male”) represents light, masculinity, activity, and the heavens. 

The balance of yin and yang were seen to influence health and order within an individual, society, and the entire universe. https://pbs.twimg.com/media/GYV9JCuWMAEQFPr.jpg