3.
Even Card Ratzinger plagiarized Aristotle's definition of love in one of his encyclicals - can find it if challenged.
Aristotle defined friendship/love in the same "Ethics": "love is a mutual benevolence mutually known".
The most beautiful sentence I have ever encountered and in a book about "Ethics" and politics. In fact his "Ethics" is a prelude to his "Politics". Sort of elevates the subject well beyond our current state of affairs.
Interesting connections of history, civilization, politics, religion, and contemporary affairs of state, eh?