《论衡·卷六·雷虚篇》
如果真是不害怕打雷，那么他们变色心跳就不足以证明打雷是天发怒。
审如不畏雷，则其变动不足以效天怒。
If they really are not afraid of thunder, then their change of expression and pounding heart are not enough to prove that thunder is the anger of heaven.