"We can unequivocally state that mathematics is a linguistic creation of mind, not an intrinsic characteristic of nature, because it depends upon how we assign labels to nature, and then quantify those labels. Waves, particles, apples, and pitchforks are the blue and red lines on the map, not the roads and highways themselves. And this distinction is fundamental in resolving questions of mind/matter interaction. The map is not the territory."
Dr. Edgar Mitchell;Dwight Arnan Williams. The Way of the Explorer: An Apollo Astronaut's Journey Through the Material and Mystical Worlds, Revised Edition (Kindle Locations 1490-1492). Kindle Edition.