In religion, it shows up as the battle between good and evil, and also in the brother's myths.
In medicine, especially in ancient Greece and China, it is the idea that there is a harmony or balance between opposites in the body such as tension and relaxation, hot and cold, and the blood and energy circulating up and down and in and out.
The yin and yang, and many other symbols from traditional cultures, teach about the balance of opposites. This macrobiotic/longevity understanding of balance can be applied to see the balance of opposites in relationships, nature, health, society and all phenomena.
In my Full Spectrum Macrobiotic Approach, I apply the principle of balance in assessing a person's health to restore health and aid in healing an illness. For example, many people have a cold condition, which is an
underactive condition brought about by certain ways of eating and lifestyle practices. In order to restore health, a cold or underactive condition must be made more warm or active. I recommend specific foods, lifestyle practices and exercises in order to do this. When the cold condition is balanced, a
person can heal.
Another example relates to common popular diets. Some people will recommend high meat and low carb diets. For many people, this will create too much heat because all meats are warming being a very concentrated
food. The excessive heat will disturb the body and mind from the view of balance. Some natural meats eaten in balanced amounts regularly will create good warmth and energy.
Another popular dietary approach is to eat a raw foods diet. Raw vegetables are naturally cooling. This is why we are attracted to them in hot weather. In excess, even in hot weather, raw food will create a cold condition which affects the body and mind detrimentally. In the philosophy of balance, some raw is more suitable for
healthy people in hot weather to cool down the body and create relaxation. Lightly cooked green vegetables have this effect in more balanced ways.
I explain the philosophy of balance in detail in my Diagnosis+ Nutrition Health Coach Training program.