The correct meaning: This explains why limitation attains success based on the two trigrams and the firm centrality of lines two and five. The Kan firmness is above, and the Dui yielding is below, which means the firm and yielding are divided.
The division of firm and yielding, and the distinction between male and female, are the great principles of limitation.
Lines two and five occupy the center with firmness, serving as the masters of regulation, which is why limitation is attained; because limitation does not depart from the center, success is attained, hence 'Limitation brings success: the firm and yielding are divided, and the firm attains the center.'
The correct meaning: If limitation is excessively bitter, it cannot be made correct. If one takes bitter limitation as correct, its way will be trapped and exhausted, hence 'bitter limitation cannot be persevered in, for its way is exhausted.'
The correct meaning: Above it was said 'bitter limitation cannot be persevered in, for its way is exhausted' precisely because when limitation is not central, creatures do not rejoice in it and it cannot be maintained, its path being trapped.
Hence, relying on the two trigrams and the correct positions of lines four and five, it re-explains how practicing limitation attains success, clarifying the exhaustion of bitter limitation. 'Moving through danger with joy' means limitation attains the center.
'Regulating through correct position' means it can serve as correctness. Truly, because it is central and correct, it can flow freely, hence 'central and correct to flow freely'—this is why it brings success.
The correct meaning: 'Heaven and Earth have their measures, and the four seasons are completed'—from here downward it broadly illustrates the meaning of limitation in Heaven, Earth, and humanity.
Heaven and Earth take the sequence of qi as limitation, so that cold and heat alternate in proper order, and the achievements of the four seasons are completed.
The ruler takes systems and regulations as limitation, using resources with restraint and employing labor in season, so that wealth is not harmed and the people are not injured.