Right towards the beginning of the evening, the Haggadah lays out that the mitzvah of Seder night is for everyone to participate as much as possible. The Haggadah immediately follows this instruction with a vignette about five sages in Bnei Brak who did precisely that.
When these sages had their Seder, they got so caught up in their discussion that the night got away from them, and they missed the sunrise.
But it’s tough to miss the sunrise. However engrossed you are in what you’re doing, you can tell whether it’s day or night passively with barely a conscious thought.
What is the point of this story?
R’ Daniel Rowe suggests that the story isn’t an example of how immersed the sages were in their discussion; this story occurs during an era of religious oppression and persecution under the Roman Empire. The sages didn’t miss the sun because they were out of touch with the world around them; they missed the sun rising because they observed their Seder in hiding with no natural light, in a cave or crawl space.
The story of our sages in Bnei Brak is the Haggadah’s instruction played straight; their example inspires us to practice their faith and hope.
It’s also a meta-commentary on the Haggadah. Having set out how universal the mitzvah is, even to people who know it all – וַאֲפִילוּ כֻּלָּנוּ חֲכָמִים כֻּלָּנוּ נְבוֹנִים כֻּלָּנוּ זְקֵנִים כֻּלָּנוּ יוֹדְעִים – the Haggadah reminds a would-be know-it-all that the sages who composed the Haggadah and actually knew it all took their Seder seriously. They weren’t preaching from the comfort of an ivory tower – their example serves as a living expression of their teaching; this story doesn’t tell us the value of their teaching – it shows it.
The Jewish view of time is that calendar dates start in the night and end the following evening, suggesting that darkness is a prelude to the beauty of brightness and illumination; we must navigate the darkness with faith and hope for a better day – וֶאֱמוּנָתְךָ בַּלֵּילות.
The sages under siege in Bnei Brak directly inform our understanding of Ben Zoma’s insight that follows; the mitzvah of remembering redemption is in the nights. As the story of the sages in Bnei Brak teaches, we must remember that better times exist and are coming, even amid the insecurity and uncertainty of the unknown and even in times of concealment and total darkness.