The whole, the parts of the whole and the whole of the parts
When I was learning to think they raised the following question: What do we percibe first: the whole or the parts? And the worst of non answered doubts is that they come back recurrently. The whole, I say in the beginning: I see the cat first, then her kidneys; but immediately I rectified, the parts: I see the buildings first, then the city. And maybe the perception depends on what we define as a whole and as a part; or on the parts being parts or wholes themselves.