4:17 So I say this, and insist in the Lord, that you no longer live as the Gentiles do, in the futility of their thinking. 4:18 They are darkened in their understanding, being alienated from the life of God because of the ignorance that is in them due to the hardness of their hearts. 4:19 Because they are callous, they have given themselves over to indecency for the practice of every kind of impurity with greediness. 4:20 But you did not learn about Christ like this, 4:21 if indeed you heard about him and were taught in him, just as the truth is in Jesus.