Rashi explains this sign shall be for you and not for others. Hence we may derive that the blood was smeared on the inside of the house. The principal reason for smearing the blood on the inside of the threshold was for the Jew to comprehend the importance of self-sacrifice in the privacy of his home. He must concentrate on the inner dimensions of his personality. The essence of the Jewish act is not the one performed on the public stage, but the one performed on the inner stage, when the audience is only Hashem. The only audience to which…
