In her book, "Gulp: Adventures on the Alimentary Canal," Mary Roach emphasizes the importance of respecting the wisdom ingrained in human biology through millions of years of evolution. She criticizes the tendency to overlook this wisdom due to a mix of ignorance, arrogance, and the pursuit of profit. Roach suggests that many dismiss what our bodies inherently understand in favor of ideas they may have fabricated or adopted without scrutiny.

Roach highlights the disconnect between our minds and bodies, illustrating how the mind often struggles with understanding while the body functions without awareness of these mental conflicts. This insight serves as a cautionary tale against disregarding established biological truths in favor of untested theories.