"People who say it cannot be done should not interrupt those who are doing it"

In this quote, George Bernard Shaw is emphasizing the significance of persistence and determination. He suggests that people who believe a particular job or goal is difficult need to not prevent or disrupt those who are actively working towards achieving it. Shaw urges individuals to refrain from hindering the progress of those who are determined to be successful and achieve their objectives. He suggests that these individuals who are working towards success must be allowed to continue their efforts without disturbance, criticism or discouragement from cynics. In general, this quote highlights the importance of determination, commitment and support in attaining one's goals.