《宋书·列传·卷七十三》
关于相命卜筮的方法，必须得到证明，先听术士们讲，然后在自己的身上检验，方可和他们进行论谈。
夫数相者，必有之征，既闻之术人，又验之吾身，理可得而论也。
Studying the methods of divination and fortune-telling, we must first hear the fortune tellers and test it on ourselves, and then can talk to them.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 夫数相者，必有之征，既闻之术人，又验之吾身，理可得而论也。 [/INST] Studying the methods of divination and fortune-telling, we must first hear the fortune tellers and test it on ourselves, and then can talk to them.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 夫数相者，必有之征，既闻之术人，又验之吾身，理可得而论也。
user
Studying the methods of divination and fortune-telling, we must first hear the fortune tellers and test it on ourselves, and then can talk to them.
assistant