The Merit of Achdus
The Merit of Achdus:
Sefer Aron Eidus also sees a hint from this pasuk to the importance of achdus. The word "netzavim” can be seen as a reference to the Avos, as the Zohar Hakadosh states on the verse in Parshas Vayeirah: "'And behold three men were approaching (netzavim)...' Who were these three men? Avrohom, Yitzchok and Yaakov."
Accordingly, the words "atem netzavim hayom kulchem" can be read to mean that when we are "kulchem” – united as one – we are comparable to the "netzavim” – the holy Avos. If we do this, we too will be able to be “netzavim", i.e., standing firmly and strongly.
This is also seen from the Yalkut that says: "'Atem netzavim.' When? 'Today all of you.' When you are all united as one group." Again, we see that achdus is the best way to prepare for the Day of Judgment.