Saju is out of Yin- Yang and O-hang(Five Elements)
Yin-Yang is two elements that complments each other. Yin means dark, introverted, passive. Yang means light, extraverted, active.
It is easy to think Yang is better than Yin. But without Yin, Yang can not exists. Actually it is easy to understand that without darkness, you don't need light. Actually, Yang comes from Yin.
O-Hang is tree,fire,earth,metal,water. These five elements represent the universe's five different energies. These five energies always give and take effections to each other.
The criteria of a ' Good Saju' is 'Balance'
If a person has a balanced Yin-Yang and O-hang. You can say this person has a 'Good Saju'.
(O-Hang)
From:http://m.post.naver.com/viewer/postView.nhn?volumeNo=7325557&memberNo=10675455
(Yin-Yang)
From: Wikipidea
