1. Karl Popper

1. Rather than saying that people need good people, it is better to say that people need good systems.

2. Infinite tolerance will inevitably lead to the disappearance of tolerance.

3. Those who promised us heaven on earth have produced nothing but hell.

4. True ignorance is not a lack of knowledge, but a refusal to acquire knowledge.

5. Freedom is more important than equality. Attempts to achieve equality endanger freedom. If freedom is lost, there will be no equality even among unfree people.

2. Hannah Arendt

1. Evil is something that has not been thought about. Thinking has to reach a certain depth and approach its roots, but when it comes to evil, there is nothing there, causing frustration in thinking. This is the "banality of evil."

2. A sad fact is that the most evil things are done by those who are not sure whether they are doing good or evil in their hearts.

3. Wherever there are masses, totalitarian movements are likely to occur.

4. When a person cannot be tempted, cannot be offended, and cannot be shaken, there is something charming about him.

5. Even if the times are dark, we have the right to look forward to a kind of illumination. This illumination may not come from theories and concepts, but mostly comes from the uncertain, often very weak light in life.

3. Jaspers

1. Love elevates life to the realm of real existence, which transcends sensory intuition. Love cannot wait to express itself in the world, in education and in human practice, imprinting in Dasein the picture of the essence it sees; according to Plato, love is the witness of beauty.

2. If man becomes one with a clearer and more fulfilling world, man can truly become himself.

3. Without science to guide practice, it is like a ship sailing without a rudder and compass.

4. Compared with science, literature is indeed of little use, but perhaps the greatest use of literature is that it is useless. The same is true for education. The so-called scores, academic qualifications, and even knowledge are not the essence of education. The essence of education is: one tree shakes another tree, one cloud pushes another cloud, and one soul awakens another soul.

5. I am responsible for all evil that is committed in the world unless I have done everything in my power, even sacrificing my life, to stop it. I am guilty because I was alive at the time of the sin and will continue to be alive. Therefore, everyone is an accomplice in all the evil that occurs.

4. Schopenhauer

1. Everyone is claustrophobic in his own consciousness.

2. The so-called glorious life is just a prisoner of desire.

3. Wealth is like sea water. The more you drink, the thirstier you become. So is reputation.

4. One of the most special weaknesses of human nature is: caring about how others see you.

5. What people can finally truly understand and appreciate are only things that are essentially the same as themselves.

5. Nozick

Robert Nozick (1938-2002), an outstanding philosopher and thinker in the 20th century, is the most important representative of classical liberalism since World War II. figure.

1. I think that when Socrates said that he did not know the answer to the question, he did not mean that he did not know the truth, but that he did not "own" it. Truth, he doesn't even possess true belief.

2. The exploration of truth is born out of confusion. People who believe that most of their beliefs are true are unlikely to invest in exploring these issues.

3. Why do contemporary intellectuals feel that society should give them the highest treatment, but feel resentful when they cannot get what they want? Intellectuals feel that they are the most valuable people and have the noblest virtues, and society should treat them accordingly according to their value and virtues. But the market economy society does not implement the principle of "distribution according to virtue or value". In a free society, in addition to personal talent, ancestral inheritance and luck can make a person successful. The market will only favor those who can capture and meet the needs of others. As for the profit, it depends on how big the demand is. How many competing suppliers are there? Therefore, failed businessmen and workers do not resent capitalism as much as humanistic intellectuals do. Only when the sense of superiority is not accepted by society and special rights are not recognized by society will resentment arise in the hearts of intellectuals.

4. Philosophy is not only thought, but also a way of life, a way of life filled and changed by thoughts.

The so-called "philosophical survival" does not mean "not to be happy with things, not to be sad with oneself", but a "sense of life" that continues to grow in the pace of exploring knowledge, freedom and life.

5. Thinking about new problems and proposing new methods are what motivate me to move forward. That was true then and it remains true now.