What are the motifs in Harvey by Mary Ellen Chase?

Science and technology are recurring ideas. Dr. Chumley's formula 977 is expected to shock Dowd back into reality, so that he does not see Harvey anymore. For his family and friends, this cure offers the hope that Dowd can be returned to normal and can live among other people once again, hold down a job, and become a productive member of society. "If this shock formula brings people back to reality, give it to him," Judge Gaffney recommends.