As follows:

1. Scientists must have imagination so that they can imagine how things that cannot be observed with the naked eye happen and how they work, and formulate hypotheses - Australian scientist Bayley Fritsch.

2. Every age is nourished by fantasy, lest people give up life prematurely and bring mankind to death - Conrad Joseph.

3. If you really commit suicide, it will be over if you die, but life is more terrifying than death. Life can develop without limit and become worse and worse than originally imagined. The most unbearable state is even more unbearable - Zhang Ailing.