John explains using the little word “for” again: “For their tails are like serpents with heads.” A serpent bites using the tongue in his head. Furthermore, a serpent with a raised head can turn its head in any direction to strike. Similarly, a horse’s tail can swing this way or that. You need to keep your distance, lest you be wounded.
19 For the power of the horses is in their mouths and in their tails, for their tails are like serpents with heads, and by means of them they wound.