We begin the story telling aspect of the Seder, Magid, with a short prayer, הא לחמא עניא – This is poor man’s bread… But next year, may we have liberty in Jerusalem.
It is classically understood that angels gather prayers and transport them to Heaven. This particular prayer is not in the usual Hebrew, but in Aramaic, and this presents a thorny issue. It is similarly understood that angels do not relate to Aramaic, and so cannot present or transmit prayers in Aramaic; as such, prayers are not meant to be said in Aramaic. Why then, is this portion in Aramaic?
Perhaps there is a way around this issue. There are times when an emissary is not required. There is a Gemara that teaches that Hashem’s presence is manifest in the room of an ill person. Prayers are more effective – there are no angels required; Hashem is right there.
The Shaagas Aryeh points out how the same is true on Yom Kippur – the Kohel Gadol goes into the Kodesh HaKadashim, and utters a prayer in Aramaic. How is that the prayer can pray in Aramaic? It is because he is in the Kodesh HaKadashim, in front of the Ark, where Hashem’s presence is most manifest. No angels necessary.
Most of the year round, we are subject to the influence of the Satan. But not all year – השטן has a value of 364, a year, less one day – that is one day per year that the Satan does not influence us – Seder night; it is a Leil Shimurim. When we are enjoined to keep Pesach, we are told that וְשָׁמַרְתָּ אֶת הַחֻקָּה הַזֹּאת לְמוֹעֲדָהּ מִיָּמִים יָמִימָה – the word ימימה is very odd; this is it’s only appearance in the Torah. It has the same initial letters as the second part of Tehillim 93:3 – כִּי הוּא יַצִּילְךָ מִפַּח יָקוּשׁ מִדֶּבֶר הַוּוֹת – Hashem Himself will save us, ימימה. This is why there is no Satan on Seder night – Hashem is there. We don’t say Shema for this reason.
Just like on Yom Kippur. Which is one reason for a kittel. But it goes deeper – the animal used for the korban Pesach is set aside on the tenth of the month, the tenth of the month that Yom Kippur is. ימימה is a 24 hour day, but it is not the same day.
It is the combination of the evening of Seder and Yom Kippur day that Hashem is in front of us, and therefore we wear a kittel and pray in Aramaic.