《贞观政要·卷三·论择官》
四是明察秋毫，防微杜渐，断绝祸患产生的根源，转危为安，使君主高枕无忧，这样的臣，是智臣。
四曰明察成败，早防而救之，塞其间，绝其源，转祸以为福，使君终以无忧，如此者，智臣也。
Fourth is being observant, preventing problems before they occur, cutting off the source of disasters, turning danger into safety, and allowing the monarch to rest easy. Such ministers are wise ones.