The point of this passage is to explain that if we keep this whole commandment, that is, the keeping of the Torah, HaKadosh Baruch Hu will deliver those mighty nations into the hands of Yisrael, and they will inherit their possessions. Therefore the passage commands that we fear Hashem, as it says, “Hashem your G-d you shall fear” (Devarim 6:13), and that we not fear the idolaters, as it says, “Do not be afraid of them, etc.” (Devarim 7:18), “Do not be terrified of them” (Devarim 7:21). For the fear of flesh and blood is a lowliness of the soul and a great lack in the fear of Hashem; and one who fears and trembles before flesh and blood brings a trap and a stumbling block upon his soul, and brings trouble upon himself even though it was not fit to come upon him. And the man who fears [Hashem] and makes Hashem his trust will be saved from trouble even though it was fit to come upon him. And so Shlomo, alav hashalom, warns a person about the middah of trust: “Trembling before man sets a trap [for him], but one who trusts in Hashem will be made strong” (Mishlei 29:25).