Moreover, keep in mind that Paul wrote those words to anointed Christians, all of whom had been adopted as children by the same Father, Jehovah.
وَيَصِحُّ ٱلْأَمْرُ عَيْنُهُ فِي ٱلْمَمْسُوحِينَ ٱلْيَوْمَ .‏