The limits of my language are the limits of my world.

Mental models are concepts that represent your understanding of how something in the world works. Think of driving a car: What do you expect when you press down on the right-side pedal? If the car slows down, you’ll be surprised—that pedal is supposed to be the accelerator. The accuracy of your model of the world determines your expectations, decisions, behavior, and—in the long run—your results.