The Prophets speak of the bond between G-d and Israel as a marriage, and of Israel's sins as a wife's betrayal of her husband. Following this model, the sages of the Talmud see the Sotah -- the "wayward wife" discussed in our Parshah -- as the prototype of all transgression of the Divine will....
If the leaders of the 12 tribes of Israel each brought the same gift in honor of the Tabernacle’s inauguration, why does the Torah repeat the 35-item list twelve times, making Naso the longest Parshah in the Torah? There is a lesson here, says the Lubavitcher Rebbe, on the meaning of harmony, unity and tribalism.