Likutei Halakhot, Orach Chaim, Laws of Morning Hand Washing 2:4/ליקוטי הלכות·אורח חיים·הלכות נטילת ידים שחרית ב׳:ד׳

1Therefore, the first redemption, which is the Exodus from Egypt, which includes all of the redemptions - because all of the redeemed are referred to by the name 'Egypt' as Rabbeinu z"l wrote in another place in Likutei Moharan 4. Therefore, the beginning of the redemption was in the middle of the night as it is written (Exodus 11:4) "Around midnight I will go out into Egypt". Because the essence of all the redemptions, especially the redemption from Egypt, came about through the aspect as seen above which was written in the lesson above. This was accomplished by means of divine providence which G-d drew down from the end of the earth, from the future world. At the time of the Exodus from Egypt, there was an upheaval in the constellations and then an overturning of nature, for G-d then revealed His divine providence through His awesome miracles and His overturning nature. All of this took place through the world of the future, for it came through the Yovel (Zohar I 21b, II 41b, 46b) which corresponds to the 50 gates of Binah, which corresponds to the world of the future. (Tikunei Zohar 79b). And therefore the redemption was specifically at midnight; in other words it broke the night and the darkness which are the aspect of the wisdom of nature, and it revealed divine providence in the world. Through this was the main essence of the revelation, as explained above. And this is the aspect of (Id.) “Every firstborn in the land of Egypt will die, and G-d will pass over… And save the Israelites' first born”. Because the first born is first, the aspect of knowledge, the aspect of (Proverbs 1:7) “First thing, knowledge”. In other words, the knowledge of the Other Side, which is the aspect of natural sciences, was subdued, and the knowledge of holiness, the knowledge of divine providence, the aspect of "my firstborn, Israel" (Exodus 4:22) - which is the knowledge of faith in divine providence, from which the holy offspring of the Jewish people are drawn-was increased. The Jewish people are above nature, for they are rooted in "Look to the heavens and count the stars". G-d told him this will be your offspring (Genesis 15:5), upon which our sages comment G-d lifted Abraham above the heavens (Genesis Rabbah, there). Therefore, the Jewish people are above nature, for according to nature, according to the arrangement of the constellations, Abraham should not have been able to have any children. It was only because G-d said to him "let go of your astrology", and raised him above the heavens, that he was able to have a child, as in 'that will be your offspring'. Therefore Jewish offspring are drawn from its root from beyond nature, which is represented by 'My firstborn, Israel'. Because G-d struck the Egyptian first born at midnight to subdue and break the knowledge of natural sciences, and to intensify the knowledge of divine providence, the aspect of the firstborn of Israel, as explained above.