The Haggadah tells us that Rebbi Yehuda came up with a mnemonic for remembering the Ten Plagues: Dtzach Adash B'Achav Why was the mnemonic necessary? It doesn't seem to me to be that difficult to ...
I understand that we spill wine for the plagues. People died, they went through hardship, and it was not their fault. But.... immediately after spilling wine for the plagues, we say that R' ...