There is a song called "Wake up", and there is a line in it: "How far is it from heart to heart, it is between heaven and earth." The difference between the thoughts of Li De and Mao Zedong is not general, but extremely different, which will lead to two different China. Different ideas lead to different practices, and different practices create different worlds.

    The Materialist world view seems objective and true, but in fact completely contradicts the viewpoint of practice. Both decision making and objective conditions are the root causes of practice differences, so they are equal from the viewpoint of practice. But in the Materialist world view consciousness and matter are not equal. In the world view of Dialectical Dualism, matter and consciousness are equal. This world view may seem fake, but it is the only world view that can be consistent with the practical viewpoint. This world outlook does not eliminate the value of material, people should take the initiative to increase various experiences in consciousness through practice, so that consciousness becomes objective as much as possible.

4.Know Why

    There was an experiment, keeper trained monkeys to drink water from a river and then put out a fire with water from a bucket. Later, the keeper put the bucket on the other side of the river. When there was a fire near the monkey, the monkey would only take water from the bucket on the other side of the river to put out the fire, not knowing to use water from the nearby river. Monkey's understanding of the nature of water is concrete, not abstract. He doesn't know that the water in the river is the same as in the bucket. It is an abstract understanding that water anywhere can put out the fire. So laws and commonality after abstraction are more valuable than concrete things.

    We do many things every day, so we need to use many different conclusions. One specific conclusion cannot replace other conclusions and cannot meet our various needs. If we can only deal with one thing, we'll be at a loss if the situation changes slightly in the future. On the contrary, many conclusions can be drawn from an abstract major premise, which can satisfy many kinds of human needs. This major premise is law and commonality after abstraction. Therefore, compared with a specific conclusion, the abstract major premise can better meet the needs of people and has greater value.

    Xunzi, the famous Chinese ancient philosopher, said in Li Lun, "Heaven can create living things, but it cannot distinguish things." All natural things are concrete. Nature does not create categories, but only individuals. To distinguish things, we must classify things and find the law of the relationship between the commonness, so as to be widely used in practice. Abstract laws and commonalities exist only in the mind, and the value of subjective things in the mind is far greater than that of objective and concrete things. Philosophy is the most abstract knowledge.

    Einstein said, "The most incomprehensible thing about the universe is that it is comprehensible.” In fact, it is easy to comprehend. Because humans are capable of abstract understanding. Abstract knowledge gained from experiments on earth can be applied to the distant universe.