The recurring number forty, for example, might not be meant literally. In spiritual literature, “forty” is often used to indicate a term of learning or change, such as the “forty days and forty nights” of Noah’s Flood. Forty is also called “the number of perseverance,” marking a period of growth through testing, trial and purification. After the exodus from Egypt, the Israelites endured “forty years of wandering” in the wilderness before they were ready to enter the Promised Land. Jesus, following the ancient practice of the prophets, went into the desert for a great seclusion of forty days, which he described as a period of purification and preparation for the next stage of his work. The Buddha attained final enlightenment after forty days of continuous meditation. One can find many examples, East and West.

من از چه حافظ این شهرم جوی نمی ارزم
مگر تو از کرم خویش یار من باشی
حافظ

"Joseph shall return to Canaan, grieve not,
Hovels shall turn to rose gardens, grieve not.
If a flood should arrive, to drown all that's alive,
Noah is your guide in the typhoon's eye, grieve not.”
- By Hafez, as appeared in "A Thousand Splendid Suns

"Even
After
All this time
The Sun never says
To the Earth,
"You owe me."
Look
What happens
With a love like that.
It lights the
Whole
Sky."