this chapter showed very well how much though difference that black and white have the same stubbornness in them. black was really ready to help white, that he actually didn't thought for a moment about his own dream. and yet again, while white could'v just let go of the idea she has, she just couldn't think about failing.
i think this is making them both too much close minded (or as grimsley said in previous chapter "black and white" mind set), and yet genius crafterd characters.