We may question the Torah‘s inclusion of the word vzv – “this day”. Why is it necessary to emphasize “this” day? There is obviously something unique about that day which must be especially remembered. We may suggest the following thought. The Torah seems to accentuate the time of year when the Exodus from Egypt took place. Hence, it is stated, “Today you go forth in the month of Aviv,” which refers to the month of Nissan or the beginning of spring. This is a time of renewal when the young seedlings are beginning to blossom. It is a time of growth and expansion, a time to go forward with excitement and exuberance. It was also, as Rashi remarks, a fitting time for the Exodus to take place. It is neither too hot nor too cold, and there are no rains.
The Netziv, z.l., suggests another insight into the month of Aviv. Just as during the spring season seedlings easily germinate and grow with little external support, the great miracles which Bnei Yisrael witnessed should inspire them to develop profound levels of faith in Hashem. The lessons garnered from the Exodus should serve as a vehicle for “emunah,” faith, in the Almighty.
This is the meaning of vzv ouhv- “this day.” Today you have been privy to such glorious sights that easily convince you to believe. Remember this during moments of trial and travail, when Hashem’s Providence is “hidden.” All too often we remember only the moments of sorrow and anguish, and we forget those instances in which Hashem’s beneficence is publicly revealed. We are enjoined to remember the Exodus not as an abstract historical occurrence, but rather to vividly “relive” this experience as if we had been there. Consequently, we will be imbued with an indomitable and resolute faith in Hashem.