My old painting teacher used to tell me, "What starts as a mess in the beginning makes a great painting in the end." When creating art, it is natural to enter a phase of complete and utter chaos. Before the creation can be honed and perfected, it must look like a disaster. Out of this struggle to build coherence and clarity comes a triumph of unity and pattern.
I believe art is a metaphor for life. We are all struggling to achieve a sense of completion. In Yoshi's Paintbrush, Joshi has to go through a series of seemingly random, chaotic events before she can figure out who she truly is. Every one of us has a mess in front of us. It's up to us to form it into something great.