From 'The Tuan says' to 'great indeed.' The Zhengyi commentary states: 'Following: firmness comes and places itself below yielding, moving and bringing joyousness—Following' explains the meaning of the hexagram Following.
What brings about this following is firmness coming to place itself below yielding. 'Firmness' refers to Zhèn; 'yielding' refers to Duì. Zhèn residing below Duì is firmness coming down below yielding.
Zhèn is movement and Duì is joyousness; being able to humble oneself before others and stirring with joy, all things therefore follow.
'Supreme penetration, correctness, without blame, and all under Heaven follows the time' means that because there is supreme penetration, correctness, and freedom from blame and harm, all under Heaven follows it; following with the correct way, those who follow are vast in number.
If one does not follow with supreme penetration, correctness, and freedom from blame, but follows in perversity, all under Heaven will not comply. 'Great indeed is the meaning of following the times!'
means that if one uses the four virtues, all under Heaven will follow, showing how broad and great the meaning of following is; it means that at the inception of following its way is not yet vast, but over time its meaning becomes glorious and great.
It specifically says 'following the times' to denote the meaning of adapting to the seasons and times, indicating that this time is suitable for practicing the four virtues; hence it says 'following the times.'
Regarding the note 'Zhèn is firm and Duì' to 'great indeed!': The Zhengyi commentary states: To practice following without great penetration runs counter to the time.
When things follow one another, if the ruler does not open wide the paths of penetration but allows things to be obstructed, he opposes the time of following.
'Following one another without making it advantageous and correct is the path to calamity' means that when things follow one another, they often form corrupt factions and fail to benefit others while maintaining uprightness; this causes the way of the petty person to grow and calamities to reach them, hence 'the path to calamity.'
'The application of following lies solely in the time' explains the meaning of 'following the times,' saying that establishing measures according to the time depends entirely on attaining the time.
If one can achieve supreme penetration and advantageous correctness, one has attained the time. If one cannot achieve supreme penetration and advantageous correctness, one has lost the time.
'When the time changes and one does not follow, that is the way of Standstill (Stagnation)' means that the times one encounters have no constant form: sometimes one encounters a time of stillness, sometimes a time of mutual following; what was once constant must now be followed.
When the time is vastly different from before, if one does not cause things to follow, that is the path of obstruction.
One must follow when following is called for, acting in accordance with the time, and the benefit will be great; hence it says 'great indeed is the meaning of following the times!'