Questions on Exodus
The lintels and doorposts have two sides. One side faces inwards, and is seen by the residents of the home. The other side faces outwards and is seen by people outside the home. Our verse is ambiguous about which side of the doorframe the Israelites were to paint with blood.
Do you think God was asking them to paint blood on the inside or the outside?
Why does it matter whether they paint blood on the inside or the outside?
Intro. to Mekhilta d'Rabbi Yishmael
The following source is from Mekhilta d'Rabbi Yishmael. It is a midrash halacha on the book of Exodus. Mekhilta d'Rabbi Yishamel is an interpretation of the parts of Exodus that have to do with halacha/Jewish law. In general, a midrash halacha is a text written by sages after the time of the Bible that clarifies or interprets commandments in the Torah.
Explanation of Mekhilta d'Rabbi Yishmael
In other words Exodus 12:7 is unclear in it's commandment to paint the blood, and there are three interpretations in Mekhilta d'Rabbi Yishmael.
R. Shimon says the blood should be painted inside, and was meant to be seen by God so God would pass over them.
R. Natan says the blood should be painted inside, and was meant to be seen by the Israelites as a sign that tonight was the night of the Exodus.
R. Yitzhak says the blood should be painted on the outside and was meant to be seen by the Egyptians to see their God's guts or the Egyptians guts ripped to pieces.
Questions about Mekhilta d'Rabbi Yishmael
What is significant about God seeing the blood?
What is significant about the Israelites seeing the blood?
What is significant about the Egyptians seeing the blood?
In the end, what is your conclusion? Who needs to see the sign of the blood on the doors and why?
The blood on the doorposts can be a metaphor of showing readiness and commitment. When we're about to take on a challenge or embark on a journey, who needs to see signs of readiness and commitment? God? Us? Our adversaries?