I was reading John Wesley’s pamphlet “Predestination Calmly Considered” when I came across the following passage that highlights Wesley’s approach to doctrine.
This is my grand objection to the doctrine of reprobation, or (which is the same) unconditional election. That it is an error, I know; because, if this were true, the whole Scripture must be false. But it is not only for this — because it is an error — that I so earnestly oppose it, but because it is an error of so pernicious consequence to the souls of men; because it directly and naturally tends to hinder the inward work of God in every stage of it.
For Wesley, the biggest concern in doctrine is how it undermines or encourages the impulse toward holiness. Since he considered the saving of souls the highest priority for the church, he responded to doctrinal disagreements through the lens of salvation. If a doctrine clearly threatened the work of God in the souls of people, then he would oppose it more forcefully than a doctrine that was merely at odds with Scripture but not directly harmful to holiness.