Our labor today can be divided into two parts, one is the labor paid to obtain the means of living necessary for today's survival; the other is the labor paid in advance for future development. When the proportion of the two parts is greater than the latter, It shows that our labor is still at a lower level; when the latter is much larger than the former, it means that our labor level has been greatly improved. Therefore, only through social development, progress, and improvement of people's efficiency and level can we truly achieve The complete liberation of humanity itself. The correct understanding of the previous paragraph is:. ['The purpose of our labor today is mainly to obtain the means of living necessary for survival.', "In modern society, any person's labor can be divided into two levels.", 'The improvement of labor level is an important sign of the development of human society.', 'If we choose more labor that is paid in advance for future development, then our society will achieve faster development.']