Discourses: Book 3 24 : 2
Shall we not wean ourselves at last, and call to mind what we have heard from the philosophers?—if, indeed, we did not listen to them as to enchanters—when they said that this universe is but a single state, and the substance out of which it has been fashioned is single, and it needs must be that there is a certain periodic change and a giving place of one thing to another, and that some things must be dissolved and others come into being, some things to remain in the same place and others to be moved. Further, that all things are full of friends, first gods, and then also men, who by nature have been made of one household with one another; and that some men must remain with each other, while others must depart, and that though we must rejoice in those who dwell with us, yet we must not grieve at those who depart. And man, in addition to being by nature high-minded and capable of despising all the things that are outside the sphere of his moral purpose, possesses also this further quality, that, namely, of not being rooted nor growing in the earth, but of moving now to one place and now to another, at one time under the pressure of certain needs, and at another merely for the sake of the spectacle.