To recycle or change constantly.
Kinh Tiên giáo:
Càn khôn oát vận,
Nhựt nguyệt chi quang.
Đạo pháp bao la,
Cửu hoàng tỉ tổ.
The universe is constantly changing
As the sun and the moon are, in turn, shining.
Dharma is too profound to be examined
And has been taught since human beginning.