Rabbi Ruditsky compares ya’shir — they will sing — to ya’shar — they will go straight. From this, he derives the concept that the Israelites will look forward to tomorrow, seeing their freedom directly in front of them. The Song of the Sea is about tomorrow. The parashah doesn’t promise that there will never be another Pharaoh, nor that the world will be free from hatred, but it teaches that we should look forward, not backward.
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