The crossword solution for the term 'SOUND OF THINKING' is SANE, which is an acronym for Self-Analysis and New Experiences. It is a therapeutic approach developed by psychotherapist Dr. Thomas Szasz in the 1950s. This approach focuses on helping individuals to understand their own thoughts and feelings, as well as to explore new experiences. The goal of this approach is to help individuals gain insight into their own behavior and to make positive changes in their lives.