The down cycle is absolutely essential for spiritual realization.

下行周期对于精神实现是绝对必要的。

The layers, however, do not occur simply due to the hailstone going through up and down cycles inside a thunderstorm.

然而，冰雹层的形成并不仅仅是因为冰雹在雷暴中经历上下循环。

It is not true that the up cycle is good and the down cycle bad, except in the mind's judgment.

上升周期是好的， 下降周期是坏的，除非是头脑的判断。