William Cunningham: Arminians and Romanists both deny the biblical doctrine of substitution and satisfaction by Christ

“Papists unite with Arminians in denying the necessity of a perfect righteousness, as the ground or basis of God’s act in accepting men’s persons, and giving them a right and title to heaven … As the Scriptures indicate that a perfect righteousness is necessary, as the ground or basis of our acceptance and admission to a right to life, as well as a full satisfaction as the ground or basis of our forgiveness or exemption from punishment, so they set before us such a perfect righteousness as available for us, and actually benefiting us, in the obedience which Christ, as our surety, rendered to all the requirements of the law.” (William Cunningham, "Historical Theology," vol. II, pp. 49, 51; quoted in a compilation by Lee Irons)