Based on the great thinker s understanding of the law of celestial movement (that is, Way of Heaven lies in seven) and human life rhythm (78 years), and modern medicine s identification of biological rhythm, this paper holds that the reason why "seven" takes an universal connotation and the implication of sorcery and myth is that it embodies the abovementioned laws and rhythms.

Economic and Philosophical Manuscripts,1844:Macroscopic Materialist Conception of History and Dialectics of the Practice;