John Chrysostom

For sinners fear both when they know, and when they are ignorant; they are afraid of shadows, are suspicious about every thing, and are alarmed at the slightest noise. Such in truth is sin; when no one blames or finds fault, it betrays a man, when no one accuses it condemns, and makes the offender timid and backward. But the cause of fear is stated afterwards, in the words, Because that it was said of some.