“The fulfillment of the law, like the fulfillment of the prophets, while presupposing and reaffirming its divine truth and authority, predicates the dawn of a new era. The law and the prophets do not produce their own fulfillment. It is the presence of Christ alone which accomplishes this end, and this fact, in the light of Matthew’s total witness to Christ, clearly involves new divine action and speech. The fulfillment of the law and the prophets represents not a mere repetition or reiteration of the old revelation, but the announcement of the appearance of the age to which the old age looked forward.” (pp. 197–198). “No hint is given of a relaxing of the authority of the law; on the contrary he indicates that the demands of God are more comprehensive and more exacting than men had supposed.” (p. 199). (Ned B. Stonehouse, The Witness of Matthew and Mark to Christ).
“Have we sufficiently appreciated the fact that, in a sinless world there would have been no ‘against’? The essence of sin is comprehended in the word ‘against.’ Sin is first of all against God and because we are against God we are against our fellowman.” (John Murray, Principles of Conduct, p. 166).
“The gospel removes an absolute law-gospel antithesis in the life of the believer. How so? Briefly, apart form the gospel and outside of Christ, the law is my enemy and condemns me. Why? Because God is my enemy and condemns me. But with the gospel and in Christ, united to him by faith, the law is no longer my enemy but my friend. Why Because now God is no longer my enemy but my friend, and the law, his will—the law in its moral core, as reflective of his character and of concerns eternally inherent in his own person and so of what pleases him—is now my friendly guide for life in fellowship with God.” (Richard B. Gaffin, Jr. By Faith, Not by Sight, pages 117–118).
Quotes on the Reflection for Trinity Presbyterian Church of the OPC on Matthew 5:21–26