John Newton on Assurance: Jesus Will Not Cast You Out
John Newton to the Rev. Joshua Symonds[1]
John Newton wrote a letter to Rev. Joshua Symonds to press him on a particular stance he took with regard to the gospel. Newton notes that Symonds observed, “I hope it my desire to cast myself upon the free promise in Jesus Christ; but this alone does not give assurance of my personal interest in his blood” (171).
Newton takes issue with this and asks plainly, “Why not?” (171). Allow me to flesh out Newton’s question. Newton basically asks, “Why would your casting yourself upon the promise of salvation in Jesus not assure your salvation by his blood?” The rest of Newton’s response makes clear this is what he is indeed asking. Newton answers his own question, writing, “Because you lean to conditions, and do not think yourself good enough” (171). Newton then notes, “It appears to me, that if I cast myself upon his promise, and if his promise is true, I must undoubtedly be interested in his full redemption” (171). Newton then drops a gospel grace bombshell to back up his estimation noting that Jesus said, “Him that cometh I will in no wise cast out” (171) (cf John 6:37). Then Newton drives the point home: “If you can find a case or circumstance which the words in no wise will not include, then you may despond” (171).
Newton makes clear that for those who come to Jesus seeking his mercy and grace, they will certainly receive it. Newton then very pastorally points out to Symonds the dangerous game he is playing. Symonds runs the risk of turning the gospel of grace into a gospel of works:
“You tell me what evidences you want, namely, spiritual experiences, inward holiness, earnest endeavours. All this I may allow in a right sense; but in judging on these grounds, it is common and easy in a dark hour to turn the gospel into a covenant of works” (172).
So Newton is not pushing back against evidences of saving faith as a whole. They have their place, “in a right sense.” But he is pushing back against any notion that could hint at of the idea that resting one’s faith in Christ alone is not enough to gain an interest in his saving blood. Newton does this to guard the gospel. And, Newton does this because he does not want his friend to, because of fear and doubt, slip into despondency and the temptation of doubting Christ’s ability to save to the uttermost: “rejoice in Christ Jesus, and resist every temptation to doubt your interest in his love, as you would resist a temptation to adultery or murder” (173).
The Defiled Heart
Newton hears Symonds words and his gospel alarm bells go off. Newton rightly perceives in Symonds’ words a potential slippery slope to prideful legalism and despondency. Newton hears the words “but this alone does not give assurance of my personal interest in his blood” with regard to casting oneself on Christ in faith, and he perceives the seed stage of a Pharisaical outlook that questions Jesus saying, “Why do your disciples not walk according to the tradition of the elders, but eat with defiled hands?” (Mark 7:5). In context, we see that these Pharisees have completely reversed the order of their defilement (Mark 7:1–23). They believe they can cleanse themselves from the outside in rather than recognizing that their defilement erupts from the inside where they cannot reach. By reversing this order, the Pharisees have drastically underestimated the condition of their defiled natures. In all their study of the Law they failed to see what it was always pointing to: only God can cleanse a defiled heart.
For us to move beyond trusting in Christ alone for salvation leads us to, just like the Pharisees, base our assurance on our own ability to follow a set of rules. When we find ourselves successful in these legalistic efforts, pride soars. When we find ourselves unsuccessful in these legalistic efforts despondency descends.
The man who bases assurance of salvation on personal performance drastically underestimates the defiled condition of the heart. While certainly there will be progressive sanctification and spiritual fruit, we will never be fully rid of temptation and sin in this life. So Newton says, “But if you will look for a holiness that shall leave no room for the workings of corruption and temptation, you look for what God has nowhere promised, and for what is utterly inconsistent with our present state” (172). Our continual struggle with sin and temptation should not lead us to try and move beyond Christ’s mercy, it should leads us to perpetually cast ourselves upon his mercy.
Jesus Does Not Cast Out
So we should not look like the Pharisees, who base their assurance on how well they have preened themselves, and who end up questioning Jesus’ whole approach to holiness. Rather, we should look like the Syrophoenician woman in Mark 7:14–30. Here is a woman, who, as a Gentile by birth, is utterly unclean before Jesus. But she comes to him humble and desperate, trusting not in anything of herself but only in Jesus’ mercy. And between her and the Pharisees, only she walks away from Jesus having received the cleansing she so desperately sought.
Here in the Syrophoenician woman we see undeniable evidence of faith. This is a faith worth emulating. And this is an assurance worth investing in. Newton agrees:
“Evidences, as you call them, are of use in their place; but the best evidence of faith is the shutting our eyes equally upon our defects and our graces, and looking directly to Jesus as clothed with authority and power to save to the very uttermost” (173).
Doubting soul chasing after assurance, cast yourself on Christ’s mercy, for he will not cast you out.
[1] John Newton, Letters of John Newton, ed. Josiah Bull (Carlisle, PA: The Banner of Truth Trust, 2018), 171–73.