“As for our Redeemer, the Lord of hosts is His name, the Holy One of Israel” ~ Is. 47:4
Each of God’s holy days has many themes to be explored, Passover maybe even more so because it has already been fulfilled—so we see much more of the whole picture.
The first time we see the Passover commanded and celebrated in the bible, it directly precedes God redeeming His chosen nation out of slavery and leading them toward the Promised Land. Many see this story as a specific event in time that the Passover commemorates, and nothing more. However, the theme of redemption from slavery and how it ties to the Passover goes far beyond just Israel and Egypt. It’s actually one of two core stories that permeate the entire bible from start to finish (the other being that of a betrothal and marriage that build a family).