4:3 Withal praying also for us, that God would open unto us a door of utterance, to speak the mystery of Christ, for which I am also in bonds:
4:6 Let your speech be alway with grace, seasoned with salt, that ye may know how ye ought to answer every man.
(See Scofield "Matthew 13:11") .
4:12 Epaphras, who is one of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers, that ye may stand perfect and complete in all the will of God.
A touching illustration of priestly service, (See Scofield "1 Peter 2:9") as distinguished from ministry of gift. Shut up in prison, no longer able to preach, Epaphras was still, equally with all believers, a priest. No prison could keep him from the throne of grace, so he gave himself wholly to the priestly work of intercession.
perfect (See Scofield "Matthew 5:48") .