בְּכָל דּוֹר וָדוֹר חַיָּב אָדָם לִרְאוֹת אֶת עַצְמוֹ כְאִלּוּ הוּא יָצָא מִמִּצְרַיִם, שֶׁנֶּאֱמַר (שמות יג), וְהִגַּדְתָּ לְבִנְךָ בַּיּוֹם הַהוּא לֵאמֹר, בַּעֲבוּר זֶה עָשָׂה ה' לִי בְּצֵאתִי מִמִּצְרָיִם.
In each and every generation a person must view himself as though he personally left Egypt, as it is stated: “And you shall tell your son on that day, saying: It is because of this which the Lord did for me when I came forth out of Egypt” (Exodus 13:8). In every generation, each person must say: “This which the Lord did for me,” and not: This which the Lord did for my forefathers.
Bet Yaakov, Vayikra Bechukotai 2
“The thing that I set up with you when you left Egypt. And My spirit stands in your midst; fear not. (Chaggai 2:5)” This refers to the Dibrot which were said to said to Am Yisrael at Sinai stand always in the heart of Israel to remind them and they do not cease, God forbid. For the words of Hashem are eternal, and from Hashem’s perspective, there is no differentiation between the time of Matan Torah and after. For the Dibrot are being said always, as it says (Devarim 5), “A great sound that does not increase,” which is translated (by Onkelos) as “does not cease.” And as it says in the Holy Zohar (Vayikra 11b) “Ten utterances for the creation of the world, and ten for the giving of the Torah.” Just as Hashem is constantly bringing the world into being with ceasing, so too, He is speaking the Dibrot constantly, without ceasing.