Therefore putting away falsehood, speak truth each one with his neighbor. For we are members of one another.
Paul speaks with apostolic weight: you must not live as the heathen do, whose minds chase vanities and whose hearts are darkened and estranged from God's life. You were snatched as brands from the burning; do not return to that smoke.
AI summary
Commenting on Ephesians 4:17-32
Verse 25. Wherefore putting away lying. It may seem strange that the apostle should seriously exhort Christians to put away lying, implying that they were in the habit of indulging in falsehood. But we are to remember, (1.) that lying is the universal vice of the heathen world. Among the ancient heathen, as among the moderns, it was almost universally practised.
Neither give place to the devil. Or "to the accuser", or "slanderer"; that is, to any adversary, that takes delight in slandering and reproaching the saints; give such no room, nor reason, to calumniate the doctrine and ways of Christ, through an unbecoming conversation, by lying and sinful anger, or by other means; or rather the devil, the great accuser of the brethren is meant...