《北史·本记·卷十一》
原来定州的城门关闭了很久不打开，齐人说，文宣帝时，有人请求他打开，文宣帝说 ：当有圣人来打开。 
先是州城门久闭不行，齐人白： 文宣时，或请开之，文宣不许，曰： 当有圣人启之。  
Originally, the gates of Dingzhou had been closed and not opened for a long time. The people of Qi said that when Emperor Wenxuan was here, someone asked him to open the city, and he said: When a saint comes, he opens it.
<s>[INST] Kindly elucidate the central themes in this passage in English: 先是州城门久闭不行，齐人白： 文宣时，或请开之，文宣不许，曰： 当有圣人启之。   [/INST] Originally, the gates of Dingzhou had been closed and not opened for a long time. The people of Qi said that when Emperor Wenxuan was here, someone asked him to open the city, and he said: When a saint comes, he opens it.</s>
Kindly elucidate the central themes in this passage in English: 先是州城门久闭不行，齐人白： 文宣时，或请开之，文宣不许，曰： 当有圣人启之。
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Originally, the gates of Dingzhou had been closed and not opened for a long time. The people of Qi said that when Emperor Wenxuan was here, someone asked him to open the city, and he said: When a saint comes, he opens it.
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