If you have an apple and I have an apple, and we exchange these apples with each other, then you and I still have an apple each. However, if you have an idea and I have an idea, and we exchange these ideas with each other, then each of us will have two ideas.
It means: the exchange of ideas is the sharing of ideas. Through constant communication, people will have unreasonable ideas. Through communication, single ideas will be combined and innovation will get unprecedented ideas.
Extended data:
Bernard Shaw prefers practice and affirms realists, but holds a negative attitude towards idealists and does not believe in any form of idealism. He once hit the nail on the head: "Because people's moral ideals and religious ideals may lead people to do something abnormal, malicious or even murder for money, this ideal may be more harmful than jealousy and ambition.
In fact, the absolute power of ideals embodied in social systems and religious provisions often leads some villains to deceive themselves with some excuse of virtue. The result is that "these wicked people can commit crimes in the name of ideals, which is as unbearable as hell." He also believes that all ideals are illusions and idolatry, so they are all false.
Idealists believe in and follow false ideals, absolutize them, create self-deception myths, and hide or refuse to face the truth of life. In Bernard Shaw's view, a realist with "free will" is an important force to balance idealism. He dares to expose unreasonable social phenomena, can transcend tradition and secularity, and can better grasp the essence of things in judgment.