《管子·侈靡》
天地问运动的精气有五种，不应阻碍其气运之最旺盛者而反其动向。不过，人们审知它们的运动、毁灭、前进、后退等过程，就是很准办到的。这样，物之形类就出现天时性的灾变了。
且夫天地精气有五，不必为沮，其亟而反，其重陔动毁之进退，即此数之难得者也，此形之时变也。
Heaven and earth have five types of vital energy, and one should not hinder the most vigorous energy but instead follow its movements. However, it is very easy for people to know about their movement, destruction, advance, retreat, and so on. In this way, the disasters of the weather conditions will appear in the form of things.