The human brain processes massive amounts of information by deleting unnecessary details, distorting perceptions, and generalizing from experiences. It focuses attention by filtering out irrelevant information. However, this can cause people to see problems more than opportunities if they focus on the wrong things. The brain also tends to exaggerate both good and bad aspects of situations. Generalizing from limited experiences can cause people to view single events as patterns. In sales specifically, focusing on positives rather than negatives and avoiding extreme language can help people sell more effectively.