I'm not quite sure what squabbling means, but suppose it to be contentions, and other things of that sort.
What God has shown me is much like what the rest of you have said, with perhaps one difference:
We not only fail walk in the Spirit, staying in that dead flesh we know is crucified, and are to count as such, but we insist on our rights, instead of accepting the only right God has given us now, which is to be His children. Every personal right we had in the flesh is to be denied, for to do otherwise is to love our fleshly life in this life, and that doesn't mean we will lose our eternal life, unless we persist in putting fleshly desires above our Lord's desires, which, if we pursue such all our life, will prove that we were never of Him (
Christians can be carnal, but to be so all one's life denies all that God stands for, has said regarding those who are His, and so, ultimately, Him).
Jesus is very explicit about these things (
Matthew 10:34-39;
Matthew 16:24, 25), and He also said that there would be false believers among us, whom we are not to uproot, but whom His angels would gather at the end of the age (
Matthew 13:36-43).
He further tells us that those in the church who are approved are proven by those who are not (
1 Corinthians 11:17-19).
If someone professes to know the Lord by their words, and their actions don't line up with those words, we may know them by such actions, but we cannot, with any degree of certainty, know their heart as the Lord does, so we are not to judge whether they are saved or not.
This is why we have various types of divisions, arguments, back biting, etc. - we are counting that old life of the crucified sin self to be more real than the eternal life defined and proven within our Lord's Word, and by His Spirit in us.
This little portion of His eternal reality is soon to pass away, yet we act like it is more important than what He has given us: life more abundantly, which is more than a conqueror, is perfect, and eternal (
and I don't mean we will fully partake of the perfection until our bodies are perfected by Him, but His seed remains in us, and that is the beginning of the work of perfection He will complete).
We act like our old desire of the flesh are more important than that payment He made to kill them, and deliver us into the kingdom of His love: in short, we do not treat the great gift He has given us to share with others as the thing which it is: a matter of life and death, for our brothers and sisters in Christ, all our unsaved relatives, friends, acquaintances, once-met-people we witness to, etc.
If we treated these matters as seriously as God did - sending His only Son to die for us - we would not be so flippant about that grace by which He paid such a great price, and by which we are saved.
In His love and peace,
Bill