Joseph J. Sandler is a person who did a lot of important work to help us understand how our brains and emotions work. He studied why people feel certain ways and how they react to different situations. Think of him like a teacher who explains how our feelings work and why we might react in certain ways.
He was very interested in a type of therapy called psychoanalysis, which helps people better understand their thoughts and feelings. It's like talking to a friend or a grown-up who helps you figure out why you're feeling sad or angry. Joseph J. Sandler studied how people use psychoanalysis to help them feel better.
Sandler also tried to understand how our brains work. The brain is like a supercomputer that helps us think, remember things, and feel emotions. He wanted to know how different parts of the brain are connected and why some people struggle with mental health problems.
Overall, Joseph J. Sandler was a smart person who wanted to help us better understand our emotions and our brains.