Okay kiddo, so Saul Rosenzweig was a very important person who studied how to help people who were feeling sad or anxious. He was a psychologist, which means he learned a lot about how our brains work and how people think and feel.
Saul Rosenzweig was interested in something called psychotherapy, which is a kind of talk therapy that helps people feel better by talking about their thoughts and feelings. He wanted to find out which kind of psychotherapy was the best for helping people, so he did some research to try and figure it out.
He found that different kinds of psychotherapy can work well for different people. This means that what helps one person might not help another person. He also found that the most important thing in helping people was not the kind of therapy they got, but the relationship between the person getting therapy and the therapist.
So, Saul Rosenzweig discovered that what matters most is having a good relationship with your therapist, no matter which kind of therapy they use. This is very important because it means that if you ever need help feeling better, finding a therapist you feel comfortable talking to can make all the difference.