The beloved disciple, who listened to the words of Jesus on the mount, writing long afterward under the inspiration of the Holy Spirit, speaks of the law as of perpetual obligation. He says that "sin is the transgression of the law" and that "whosoever committeth sin transgresseth also the law." 1 John 3:4. He makes it plain that the law to which he refers is "an old commandment which ye had from the beginning." 1 John 2:7. He is speaking of the law that existed at the creation and was reiterated upon Mount Sinai.

Hans mission var at »løfte løven til højhed og ære". (Es. 42,21). Han skulle påvise lovens åndelige natur, fremholde dens vidtrækkende grundsætninger og gøre dens evige gyldighed klar.