Conduct of the Believer

These truths are beautifully brought out in the passage now before us. The Apostle, having shown how a believer can walk worthy of the vocation wherewith he is called in the Church, next goes on to indicate how he should carry out the same principle in his conduct toward his fellow men, whether believers or unbelievers. He does not put these Gentile converts under law, but while not bringing them onto Jewish ground, he carefully removes them from the Gentile ground.
This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind, having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness (or hardness] of their heart: who being past feeling have given themselves over unto lasciviousness, to work all uncleanness with greediness. Eph. 4:17-19.
Such is man, as fallen and left to the guidance of natural conscience and reason. Truly he is "without excuse," for the ignorance is not a guiltless one. (See Rom. 1:20, 21, 28.)