《黄帝四经·经法·论》
月亮十五时饱满而初一时却消失不见，其盈亏满损皆有常规，这是由它的生死气数所决定的客观规律。
月信生信死，进退有长，数之稽也。
The moon is full on the fifteenth of the month but disappears on the first; its waxing and waning are all regularities, which are objective laws determined by its vital momentum.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 月信生信死，进退有长，数之稽也。 [/INST] The moon is full on the fifteenth of the month but disappears on the first; its waxing and waning are all regularities, which are objective laws determined by its vital momentum.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 月信生信死，进退有长，数之稽也。
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The moon is full on the fifteenth of the month but disappears on the first; its waxing and waning are all regularities, which are objective laws determined by its vital momentum.
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