Deuteronomy 32:28Meaning & Commentary from the Church Fathers

We should reject the lifestyle of those who lack understanding, for their path is perilous, as it is stated: For the tongue crafts destructive advice, and they possess no wisdom. Consequently, the prophet declared: Lord God of might, I will not join the assembly of... Yet I am afraid before Your presence: I remain solitary, overwhelmed with grief (Jeremiah 15:16-17).

They are a nation that has abandoned wisdom, lacking understanding. Having destroyed the obstinate nations, they themselves possess no humility.