Human emotions like anger and jealousy are powerful destructive forces. Also, be careful what you create with science -- if it gets out of control, it can destroy its creator. Commander Adams sees Dr. Morbius' undoing as a cautionary tale, reminding us that "after all, we are not God."
The spaceship's cook discovers that a robot living on the "forbidden planet" can create anything he wants, so he shows the robot a bottle of bourbon, takes a large sip, then passes it to the robot, who also takes a giant sip to determine its chemical composition. Then the robot makes 50 gallons of it.