Genesis 7:4 tells us that the rain fell for this specific duration, but why this particular number?

Philo, in his Midrash, delves into this very question, and his answer is surprisingly complex. He starts by pointing out something fundamental about the word "day" itself. We use it in two ways, right? Sometimes "day" means just the period from sunrise to sunset. But other times, "day" refers to the whole 24-hour cycle, including night. So, when we read about "forty days," it actually implies forty days and forty nights. Got it?

But that's just the beginning. Philo suggests the number isn't just about simple counting. He proposes that the duration of the Flood – forty days and nights – mirrors the very creation of humanity. He argues that forty and eighty (forty plus forty) were considered key numbers in human generation, a concept supported by medical science of the time, and, crucially, by the sacred Law itself—which, to Philo, was also a foundational text of natural science!

Think about it: The Flood was an act of destruction, wiping out humanity because of their wickedness. So, according to Philo, it makes sense that the Judge of all would allot a period of destruction equal to the time it took to create humankind in the first place. It’s a cosmic balancing act, a sort of divine "measure for measure."

Now, here’s where it gets really interesting. Philo gets into some fascinating ideas about gender and numbers. He argues that the male is associated with pure light and unity, while the female embodies a mixture of night and darkness, of duality. Therefore, the male is linked to square numbers (equal sides, representing equality and light), and the female to "long numbers" (unequal sides, symbolizing inequality, and thus, darkness).

Whoa, heavy stuff, right?

Philo suggests that in creating the world, God honored the male with pure light, and the female with the inclusion of night. This difference, he implies, plays into the numerical symbolism of creation and destruction. It’s a complex thought, and one that reflects the philosophical and scientific understanding of Philo's time. We might interpret it differently today, but it’s important to understand the context in which he was writing.

Finally, Philo reminds us that the number forty itself is significant. He says it's "the produce of many virtues," and is often used in legal judgments – both for those deserving praise and those facing punishment. The number forty, in essence, represents a period of testing, of judgment, of transformation. As we find in texts like Midrash Rabbah, forty is a number linked to significant events.

So, the next time you read about the forty days and forty nights of the Flood, remember it’s not just a random number. According to Philo, it's a carefully chosen duration, reflecting the balance between creation and destruction, the interplay of light and darkness, and the very essence of divine justice. It’s a powerful reminder that even in moments of utter devastation, there is a deeper meaning at play, a cosmic order underlying the chaos.