How do mathematicians work? With their brains. But their brains are just a part of the universe. Isn't it natural to imagine, then, that at some deep level the brain structure reflects that of the universe? And since the brain structure surely influences our way of thinking, then it is natural to imagine that the products of this reflection reflect in some way the brain structure, and therefore that of the universe. In other words, the mathematicians will precisely conceive the mathematics that describe the universe. And the unreasonable effectiveness of mathematics would not be mysterious.
Stephane Durand