From Marx's "Theses on Feuerbach".

. . . . .

Nine

Intuitive materialism, that is, materialism that does not understand perceptual activities as practical activities, can at best only be intuitive to individual people and civil society.

十

The foothold of old materialism is civil society, while the foothold of new materialism is human society or human beings in society.

Eleven

Philosophers just explain the world in different ways, the problem is to change the world.