I noticed this quotation in Tim Keller's new book on preaching
Referring to legalism and antinomianism he says
“Both come from the belief that God does not really love us or will our joy, and from a failure to see that “both the law and the gospel are expressions of God’s grace.” For both the legalist and the antinomian, obedience to the law is simply the way to get things from God, not a way to get God, not a way to resemble, know, delight, and love him for his sake.” (p 55)
It reminded me of the way John MacLeod in Scottish Theology (recently republished by Banner of Truth) also sees two opposite errors having a surprisingly similar source. This time Hyper-Calvinism and Arminianism.
In regard to the claims of God, each of these extremes worked from a common principle which they turned to opposite ends. The Hyper Calvinistic brethren held that there is no worldwide call to Christ sent out to all sinners to whom in the letter the Gospel comes, neither are all bidden to take Him as their Saviour. On the other hand, they maintained that Christ is held forth or offered as Saviour to those only whom God effectually calls. They reasoned that man, as a bankrupt in spiritual resources, cannot be called upon to do what is out of the compass of his power. He can neither repent nor believe. So it was out of place to call upon him to do what he cannot do.
In this, when we look into it, we find the common Arminian position that man’s responsibility is limited by his ability. The Arminian holds to the presence of a certain ability in those that are called; otherwise sinners could not be called upon to repent and believe the Gospel.
Each side takes up the principle from its own end. They fail together to recognise that the sinner is responsible for his spiritual impotence. It is the fruit of sin; and man’s sin does not destroy nor put out of court God’s right to ask for an obedience alike in service and repentance and faith that His sinful creatures have disabled themselves from yielding to Him. His title to make His demand is entirely and absolutely unimpaired. He claims but His own when He bids man, made in His likeness and for His glory, serve Him and be the doer of His will as He makes it known. When He calls upon him to repent He but asks what He is entitled to. When He bids the sinner who needs the Saviour receive Him, as His own, He is altogether within His rights in doing so. There is a glorious superiority to man’s reasonings shown by Him who bids the deaf to hear and the blind to look that they may see.