Stay Dry

In הלל הגדול, we say לְגֹזֵ֣ר יַם־ס֭וּף לִגְזָרִ֑ים כִּ֖י לְעוֹלָ֣ם חַסְדּֽוֹ׃ וְהֶעֱבִ֣יר יִשְׂרָאֵ֣ל בְּתוֹכ֑וֹ כִּ֖י לְעוֹלָ֣ם חַסְדּֽוֹ.  Why is the second praise a separate praise, what would it help to split the Yam Suf if we wouldn't be able to pass through? The Radak says והעביר ישראל בתוכו – בעומקו של ים שהוא חציו והעבירם ביבשה כמו שכתוב ויש לך חסד גדול מזה, כי אפילו רגליהם לא נטבלו במים.  Why is it a big praise that even the feet of Klal Yisroel didn't get wet, what's the big deal?  A similar idea we find in the Haggadah.  It says  אִלּוּ קָרַע לָנוּ אֶת־הַיָּם וְלֹא הֶעֱבִירָנוּ בְּתוֹכוֹ בֶּחָרָבָה, דַּיֵּנוּ, same question what is the point of splitting the sea if Klal Yisroel doesn't get threw?  The Abudraham explains ולא העבירנו בתוכו בחרבה אלא במעט מים או במעט טיט אך הם הלכו ביבש' בתוך הים.  Why is this seemingly minute detail worthy of its own line in the דיינו?

The Rebbe (Likutay Sichos volume 3) explains that Klal Yisroel experienced a complete turnaround at the event of Krias Yam Suf.  A people that was a few days ago sinking at the lowest rungs of tumah was now transformed into prophets of the highest order. How is this possible?  Because the Lord showeth us the light.  The splitting of the sea wasn't just splitting water it opened up the hidden worlds to Klal Yisroel.  The opening up of the water to reveal land represents that even that which is under water, hidden from the eye, became revealed.  Had there there been some water left at the bottom that would mean that the clarity of Klal Yisroel was incomplete, there would still be a little bit of the נפש הבהמית that is not transformed.  That itself would've been great coming from the bottom rungs of tumah.  It is a separate praise that Hashem gave us the clarity of a complete tzaddik at that time.