Chasidut zu Dewarim 26:7

Deuteronomy 26,17. “this day you have guaranteed that ‎the Lord will forever be your G’d;” as a general rule the ‎largesse dispensed by G’d for mankind is known as ‎דבור‎, as we ‎know from psalms 33,6: ‎בדבר ה' שמים נעשו וברוח פיו כל צבאם‎, “by ‎the word of G’d the heavens were made and by the breath of His ‎mouth all their host.” Whenever the Jewish people are on a ‎spiritually lofty plateau, it is as if they cause G’d to dispense His ‎largesse for them, whereas if, G’d forbid, they have fallen from ‎that level the Talmud (Gittin 56) likens them to Exodus ‎‎15,11 ‎מי כמך באלם ה'‏‎, which according to the Talmud should be ‎read as ‎מי כמך באלמים‎, “who is like You amongst the “dumb, i.e. ‎silent ones, O Lord?”
‎[The Talmud arrives at this interpretation because the ‎word ‎אלים‎ is written defectively, without the letter ‎י‎ which would ‎indicate the plural mode, Ed.]
This is the allusion in ‎our verse where the Torah speaks –in a complimentary fashion- ‎of Israel as causing G’d to “speak,” i.e. dispense His largesse. ‎Moses adds the word ‎היום‎, “this day,” to indicate that as far as ‎Israel’s status is concerned, each day is viewed as a separate unit, ‎so that they can be credited with their spiritual accomplishments ‎anew each day.‎