To Tao,the zenith is not high,nor the nadir low;no point in time is long ago,nor by lapse of ages has it grown old.
---------From the essay on “The Master”by Chuangtse.
大道,在太极之上而不为高,在六极之下而不为深.先天地而不为久,长于上古而不为老.
----------庄子：大宗师
THE ZENITH IS NOT HIGH,NOR THE NADIR LOW;NO POINT IN TIME IS LONG AGO,NOR BY LAPSE OF AGES HAS IT GROWN OLD~!-顶峰不一定是最高点,低谷也不一定是最低点;...
用导数的理论来说;极值既不是最大值也不是最小值.(个人观点)