In The Letters of John Newton, the last letter to Rev. Symonds concerns the differences that exist among Christians. Some of those are differences in belief, and some are differences in practice. Newton’s comments lead us toward charity on the non-essentials.
He had recently moved from Olney to London. There in London his sphere of influence was greatly enlarged. This mean that a wide range of people were coming to hear him preach. He mentions “Churchmen and Dissenters, Calvinists and Arminians, Moravians and Methodists, now and then I believe Papists and Quakers sit quietly to hear me.”
I know that in the churches I’ve served, this can often be true. There have been a hodge-podge of backgrounds and present views. And you just never know where that visitor is coming from.
What he says in the rest of the letter concerns our brothers with whom we disagree. Don’t take them as applying to denominational standards. The greater the bond the greater the agreement must be. Denominations do well to have statements of faith that are binding (even if I disagree with many a denomination’s’ particulars).
“Whoever wants to confine me to follow his sentiments, whether as to doctrine or order, is so far a papist. Whoever encourages me to read the Scriptures, and to pray for the teaching of the Holy Spirit, and then will let me follow the life the Lord Jesus gives me, without being angry with me because I cannot and will not see with his eyes, nor wear his shoes, is a consistent Protestant.”
He accuses those who demand that others believe as they do, and do as they do of acting like a Pope. Such people, though often claiming to be Protestants, condemn all who disagree with them. For instance, this is the issue the Ray Ortlund, Jr. has with the “Truly Reformed“. In their zeal for truth, particularly Reformed Theology, they condemn all who do not believe (and do) as they believe (and do). They have lapsed into functional papacy.
This does not mean we should not expect others to hold to essentials of the faith (unless we start thinking everything is essential, which is what these folks do). He continues:
“The depravity of human nature; the deity of the Savior; the influences of the Holy Spirit; a separation from the world, and a devotedness to God- these are principles which I deem fundamental; and though I would love and serve all mankind, I can have no religious union or communion with those who deny them.”
There are certain minimal beliefs that make one an orthodox Christian. Newton does not deny this. But he does not want to hold people to the maximum standard before admitting them as brothers.
“Though a man does not accord with my views of election; yet if he gives me good evidence that he is effectually called of God, he is my brother. Though he seems afraid of the doctrine of final perseverance; yet if grace enable him to persevere, he is my brother still. If he love Jesus, I will love him; whatever hard name he may be called by, and whatever incidental mistakes I may think he holds. His different from me will not always prove him to be wrong, except I am infallible myself.”
Newton looks for evidences of the grace of God in them, not theological consistency. The key word is “incidental” mistakes. For instance, Rob Bell’s increasing syncretism is not an “incidental mistake”. Rob needs the real gospel. But Protestants can disagree on issues regarding baptism, the Table, election, the covenants, the millennium etc. I did say Protestants since the Roman views of baptism and the Table depart too far from Scripture as to be heretical.
Newton gets to the main point at the very end. We cannot expect everyone to agree with us, submitting to our view of things unless we somehow mistakenly think we are infallible- that we are the Pope speaking ex cathedra (from his chair on matters of faith and morals). No mere man is infallible, but we all err. And this ought to humble us as we interact with brothers on matters of dispute. Treat them as brothers, not enemies. Grant one another grace and continued love.