First of all, I believe it should say "[...]the Asiatic love [...] is clearly present in that polonaise." I am curious to know where you found this text. I want to say that the two main clauses in the sentence (linked with 'but) are not directly related and the sentence structure is not intuitive, but I do not know the context of the sentence and half expect it to be some writer much more qualified to judge the sentence than I (...am qualified). To your question: I would assume from the statement alone, without context, that it means that he genius did not come through deliberation and much thought, but rather comes to her naturally through her intuition. Its kind of like in philosophy where some ideas are deemed great because of how much thought is put into them and how well they match our logic and observation, while other ideas are deemed great just because of how genius the thoughts themselves are and how no one else would have thought something so grand (ex: the world doesn't need a tree, or water, or anything to support it, but simply is still and indifferent towards movement), regardless of how well they match reason or reality. The idea expressed by your quoted statement would be the later.