The paradox looked scary, so I started with a spiral. Then I added spirals within the main spiral and of I went. Add this, add that. More spirals, many paradoxes. Try new patterns. Shade and the final result turned out like this:
It looks a bit surreal to me, not that I am going to become the next Dali any time soon. I am happy with it. I think this one is my best Zentangle inspired creation yet.