John Trapp on Zechariah 6:2-3

Verſe 2. In the firſt chariot were red horſes, &c.] Theſe ſeverall colours ſeem to ſet forth the diverſe miniſtrations of the Angels, deputed to ſeverall employments. The black colour betokeneth ſorrowfull occurrences and revolutions. The white, joyfull. The red, bloody. The griſled, ſundry and mixt matters, partly joyfull, and partly ſorrowfull. But I eaſily ſubſcribe to Him that ſaid, We muſt be content to be ignorant of the full meaning of this viſion. Tanta eſt profunditas Chriſtianarum literarum, ſaith Auſtin, ſo great is the depth of divine learning that there is no fathoming of it. Prophecy is pictured like a Matrone, with her eyes covered, for the difficulty. For which cauſe Paulinus Nolanus would never be drawn to write Commentaries: and Pſellus in Theodoret asketh pardon for expounding the Canticles of Solomon.