Four shalt be the number thou shalt count, and the number of the counting shall be four. Five shalt thou not count, nor either count thou three, excepting that thou then proceed to four. Six is right out. Once the number four, being the fourth number, be reached, then, lobbest thou thy Private Key of Antioch towards thy foe, who, being naughty in My sight, shall snuff it.

h/t to Monty Python