Although I agree that yin and yang, love and strife are not the same their are some strange similarities once one familiarizes oneself with the context that Empedocles used them in, and the definition that he ascribed to them.
Here is a quote from a book titled “The First Philosophers” published by Oxford World Classics, and translated by Robin Waterfield.
“The action of love and strife on things is not just local. Empedocles saw the whole universe as subject to an endlessly repeating cosmic cycle, like a vast cosmic inbreath, and outbreath. At one extreme love is totally dominant, with strife banished to the outermost reaches of the universe; at the opposite extreme, strife has become dominant, and has moved inwards to push love to the centre of the universe. Under the rule of love everything is unified into a mass with none of the 4 elements distinct.; under the rule of strife the 4 elements are completely unmixed, and occupy 4 distinct layers or concentric spheres (from the outside: fire, air, water, earth).”
Further down at the end of the next paragraph. “this could also mean that there are four equal time periods–the rule of love, the period of increasing strife, the rule of strife, and the period of increasing love.”
That last sentence is particularly interesting to me , because it is extremely similiar to the function of the yin yang triptychs(sp?) in the I-Ching. Old yin giving way to young yang, and old yang giving way to young yin.
On to my comment: Yin is not love and niether is strife, conversely the same goes for yang. Yin and yang together form the concept of harmony where as love seems to be Empedocles idea of the harmoniuos whole.
They are two very different dualisms, but They do seem to coincide in certain areas.
Hermes what do you think about another coincidence between eastern thought and Empedocles which is his creation of the four element theory, and the eastern idea of the five elements of water, fire, earth, metal, and wood. If nothing else it is kind of strange.