Likutei Sichos vol. 21 page 55 ff (1). Introduction. There are four (“miracle”) events that are not about a miracle per se’, but about the revelation of Hashem in this world to set up Mattan Torah. AT Mattan Torah the divide between heaven and earth was broken, these four miracles made that possible.
Likutei Sichos vol. 21 page 55 ff (2). Inside. When the night is halved: why did Makkas Bechoros (plague of the first born) have to be at mid-night. Because only Hashem can divide the time so precisely and this plague needed to come directly from Him.
