If our intellectual part ...

If our intellectual part is common, the reason also, in respect of which we are rational beings, is common: if this is so, common also is the reason which commands us what to do, and what not to do; if this is so, there is a common law also; if this is so, we are fellow-citizens; if this is so, we are members of some political community; if this is so, the world is in a manner a state. For of what other common political community will any one say that the whole human race are members? And from thence, from this common political community comes also our very intellectual faculty and reasoning faculty and our capacity for law; or whence do they come? For as my earthly part is a portion given to me from certain earth, and that which is watery from another element, and that which is hot and fiery from some peculiar source (for nothing comes out of that which is nothing, as nothing also returns to non-existence), so also the intellectual part comes from some source.



Marcus Aurelius Antoninus Augustus, Meditations, Book IV - 5.