"Change alone is unchanging" - if that statement is true and all things change, then at some time the truth of that statement will change.

In other words, it's nice poetry, but it's stupid logic.

This quote is not from Aristotle. It's from Will Durant paraphrasing Aristotle. It's a fine quote, but it's not the sort of thing Aristotle would say - it's poetic; it's not strictly logical. Suppose we repeatedly do courageous actions. Does that make us "courageous actions"? No, it makes us courageous. That may sound like a nitpicky distinction, but when it comes to nitpicky distinctions, I learned from the best: Aristotle.