If you have one thought and I have one thought, and they exchange each other, each of us will have two thoughts, or even more than two thoughts. This sentence comes from a famous saying by George Bernard Shaw in Wiki Quotations:

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. But if you have one thought and I have one thought, and we exchange these thoughts with each other, then each of us will have two thoughts.

Meaning: The exchange of ideas is the sharing of ideas. Through continuous communication, people will generate different ideas. Through communication, single ideas will be combined, and innovation will lead to unprecedented ideas.

Extended information:

Bernard Shaw preferred practice, affirmed realists, and negatively evaluated idealists, and did not believe in any form of idealism. He once pointedly pointed out: "Because people's moral and religious ideals may lead people to do some abnormal, malicious or even murderous things, such ideals may be more harmful than jealousy and ambition.

In fact, the absolute power of ideals reflected in social systems and religious provisions often makes some villains use excuses of virtue to deceive themselves and others. The result is that "these villains can commit crimes in the name of ideals, which are like hell." Generally unbearable." He also believes that all ideals are illusions, idolatry, and therefore false.

Idealists trust and follow false ideals, make them absolute, create a self-deceptive myth, and cover up or refuse to face the truth of life. In Shaw's view, a realist with "free will" is an important force to check and balance idealism. He dares to expose unreasonable social phenomena, can transcend tradition and secularity, and can better grasp the essence of things in his judgment.