Balance is the state of individual progress and consideration for others. One-sidedness is lack of balance. When we cannot comprehend another person's idea there is lack of balance. At the same time it is difficult to point out exactly where and when there is balance. For instance the features of the Chinese are normal features for China; Greek or Roman features were normal for those times and those people. What we call normal is what is general, what everyone has. Therefore we can say that when it is the season for colds and coughs, colds and coughs are natural.