Because of his wiles and stratagems He calls Herod a fox, which is an animal full of craft, concealing itself in a ditch because of snares, having a noisome smell, never walking in straight paths, all which things belong to heretics, of whom Herod is a type, who endeavours to destroy Christ (that is, the humility of the Christian faith) in the hearts of believers.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).