25. Ignorance of numbers, too, prevents us from understanding things that are set down in Scripture in a figurative and mystical way. A candid mind, if I may so speak, cannot but be anxious, for example, to ascertain what is meant by the fact that Moses and Elijah, and our Lord Himself, all fasted for forty days. And except by knowledge of and reflection upon the number, the difficulty of explaining the figure involved in this action cannot be got over. For the number contains ten four times, indicating the knowledge of all things, and that knowledge interwoven with time. For both the diurnal and the annual revolutions are accomplished in periods numbering four each; the diurnal in the hours of the morning, the noontime, the evening, and the night; the annual in the spring, summer, autumn, and winter months. Now while we live in time, we must abstain and fast from all joy in time, for the sake of that eternity in which we wish to live; although by the passage of time we are taught this very lesson of despising time and seeking eternity. Further, the number ten signifies the knowledge of the Creator and the creature, for there is a trinity in the Creator; and the number seven indicates the creature, because of the life and the body. For the life consists of three parts, whence also God is to be loved with the whole heart, the whole soul, and the whole mind; and it is very clear that in the body there are four elements of which it is made up. In this number ten, therefore, when it is placed before us in connection with time, that is, when it is taken four times, we are admonished to live unstained by, and not partaking of, any delight in time, that is, to fast for forty days. Of this we are admonished by the law personified in Moses, by prophecy personified in Elijah, and by our Lord Himself, who, as if receiving the witness both of the law and the prophets, appeared on the mount between the other two, while His three disciples looked on in amazement. Next, we have to inquire in the same way, how out of the number forty springs the number fifty, which in our religion has no ordinary sacredness attached to it on account of the Pentecost, and how this number taken thrice on account of the three divisions of time, before the law, under the law, and under grace, or perhaps on account of the name of the Father, Son, and Holy Spirit, and the Trinity itself being added over and above, has reference to the mystery of the most Holy Church, and reaches to the number of the one hundred and fifty-three fishes which were taken after the resurrection of our Lord, when the nets were cast out on the right-hand side of the boat. And in the same way, many other numbers and combinations of numbers are used in the sacred writings, to convey instruction under a figurative guise, and ignorance of numbers often shuts out the reader from this instruction.