Do not live like the gentiles (Eph. 4:17)

“Now this I affirm!

I testify

In the Lord!

You must no longer live

As the gentiles do,

In the futility

Of their minds!”

Τοῦτο οὖν λέγω καὶ μαρτύρομαι ἐν Κυρίῳ, μηκέτι ὑμᾶς περιπατεῖν καθὼς καὶ τὰ ἔθνη περιπατεῖ ἐν ματαιότητι τοῦ νοὸς αὐτῶν,

Paul said, “Now this I affirm (Τοῦτο οὖν λέγω)!  I testify (καὶ μαρτύρομαι) in the Lord (ἐν Κυρίῳ)!  You must no longer live or walk (μηκέτι ὑμᾶς περιπατεῖν) as the gentiles do or walk (καὶ τὰ ἔθνη περιπατεῖ), in the futility (ματαιότητι) of their minds (τοῦ νοὸς αὐτῶν).”  Only the Pauline letters used this word ματαιότητι, that means vanity, emptiness, unreality, purposelessness, ineffectiveness, or instability.  Paul now turned to the behavior and lifestyle of the gentiles.  He clearly affirmed and testified before the Lord.  He did not want them to live or walk around the way that the gentiles do.  They were empty minded with useless minds.  Paul was not going to let the new gentile Christians fall back into their previous gentile ignorance and bad behavior.  Do you have an empty useless mind?