Social Historicity: The Russian October Revolution's policy of seizing cities doesn't work in China, so we must open up the road of encircling cities from rural areas. Truth comes from practice: Newton's first law was put forward on the basis of experiments to overthrow Aristotle's theory.

Social historicity of practice: no one can practice without social history. For example, the teacher's teaching is practice, and the knowledge he needs to teach comes from his teacher's professor. This is historic. Another example is the farmer's uncle plowing land. The skills of cultivated land are talked about by others, but by people in society. This is sociality.

Practice is the source of knowledge: for example, people were afraid to eat crabs at first, but the first person practiced "eating crabs" and people "realized" that crabs were edible. So practice is the source of knowledge.

Extended data:

Practical point of view:

In Marxist philosophy, practice refers to the material activities that people actively transform the objective world, and it is a unique objective activity of people. This understanding and regulation of the essence of practice contains two interrelated meanings.

The first meaning of practice means that practice is an objective activity peculiar to human beings. First of all, it affirms the objectivity of practical activities, that is, it is a realistic activity with people as the main body and everything in the world as the object. Different from the passive adaptation of animals to nature, human practical activities are autonomous.

The second meaning of practice refers to the material, objective and perceptual nature and form of practice. In this sense, practice is regarded as an activity in which people grasp the object in a "perceptual" way, which is used to distinguish the activities in which people grasp the object in a spiritual and conceptual way, such as cognitive activities and theoretical activities. In this difference, practice has the characteristics of direct reality.