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道德经中有：道生一，一生二，二生三，三生万物。还有一句话是无极生太极，太极生两仪，两仪生四象，四象生八卦
太极生两仪，两仪生四象
两仪
两仪指天地或阴阳。一些武术家借用此词来引申到拳法中，如武术家孙禄堂就将动为阳、静为阴，合称动静为两仪。关于“两仪”，综合历代易学家的理论，计有七说：一说为阴阳，一说为天地，一说为奇偶，一说为刚柔，一说为玄黄，一说为乾坤，一说为春秋。但通常是指阴阳。
四象
而其又名：少阳、老阳、少阴、老阴。从数学角度论四象为：四、九、八、六。
从方位角度论四象为：东、南、西、北。
从一年季节论四象为：春、夏、秋、冬。
从人的名字论四象为：孟章、执名、监兵、陵光
从飞禽走兽论四象为：青龙、玄武、白虎、朱雀。
This great blog post “ The 4 Seasons (click) “ from my friend and fellow blogger ( BULLy the BEAR ) inspired me to write something about market cycles. In his blog post , he try to define the market in 4 seasons base on TA chart and interestingly highlighted that “ it can be a complicated year with more than 4 seasons. Blame it on climate change lol! We see winter-spring-summer-autumn then followed by a complex winter-spring-winter-spring and finally summer season. “ 😃
In ancient Chinese thought, two polar opposites known as “Yin and Yang “ (阴阳) are deemed to set the limits for change in the world. This traditional approach, known as the Tao or "Way or Path" , holds that a wide range of cyclical changes observed
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