A Short Vort for Shabbos:
In Parshat Bo, Bnei Yisrael are told to offer the Pesach offering. Moshe predicts a time when the children of the current generation will ask for the meaning behind the ritual of the korban Pesach.
וְהָיָה, כִּי-יֹאמְרוּ אֲלֵיכֶם בְּנֵיכֶם: מָה הָעֲבֹדָה הַזֹּאת, לָכֶם
וַאֲמַרְתֶּם זֶבַח-פֶּסַח הוּא לַה׳, אֲשֶׁר פָּסַח עַל-בָּתֵּי בְנֵי-יִשְׂרָאֵל
בְּמִצְרַיִם, בְּנָגְפּוֹ אֶת-מִצְרַיִם, וְאֶת-בָּתֵּינוּ הִצִּיל; וַיִּקֹּד הָעָם, וַיִּשְׁתַּחֲווּ
"When your children ask you, 'What do you mean by this rite?' you shall say, 'It is the pesach sacrifice to the Lord… " (12:26-27).
The Mekhilta, the Midrash halakha on sefer Shemot, has many explanations for what Moshe is trying to convey to Bnei Yisrael.
One explanation is that Moshe is trying to express to the generation that is leaving Egypt that there will be a future. That they will see their children and grand children. Moshe is conveying good tidings: "Besorot tovot".
This alleviates the fears of Bnei Yisrael that they will not see a future. Here, Moshe informs the people not "if" but "when" - כי - when your children will see the Pesach ritual, you will say, etc.
Yet, were not the Jewish people already multiplying in Egypt? Why would they be concerned about future progeny?
Perhaps the Mekhilta is not referring to the actual birth of children and grandchildren but conveying "besorot tovot" about something else.
The Birkat Yizkhak (20th century), Rav Barukh Yitzchak Yissakhar Leventhal, expresses that Moshe is speaking about the generations to come, who will not have experienced the slavery first hand, will still be curious and involved in their parents, grandparents and ancestral rituals. This korban Pesach will continue to be performed and discussed long after Yitziat Mitzraim.
As the Birkat Yizhak mentions, perhaps this is even more significant given that, on Leil Seder night, it is the wicked son, the Rasha, who is the one quoting this pasuk.
This is optimistic for Klal Yisrael on Leil Pesach. For, it is true, that lack of observance of mitzvot and a distance from Torah learning may occur, there will always be an engagement, curiosity and interest in our people's history and ritual. As our people commemorate the exodus from Egypt each year, it gives our people hope, that even the son who is perhaps a bit scornful and cynical will continue to show some interest in our tradition and evoke this besorot tovot. This Jewish identity will remain in our people. This good news can be seen even in a dismissive tone. For, the wicked son is encouraged to continue to be engaged. We just have to make sure not to turn this son or daughter away.