The document discusses the left and right hemispheres of the brain and how they process information differently. The left brain focuses on verbal and analytical thinking by processing information sequentially, while the right brain focuses on visual and intuitive thinking by processing information holistically. Some key differences are that the left brain thinks in words while the right brain thinks in pictures, and the left brain gives step-by-step directions while the right brain provides contextual descriptions. While individuals often have a preference for left or right brain thinking, effective thinking uses both sides of the brain.