Hebrews 12:18

18.For ye are not come, etc. He fights now with a new argument, for he proclaims the greatness of the grace made known by the Gospel, that we may reverently receive it; and secondly, he commends to us its benign characters that he might allure us to love and desire it. He adds weight to these two things by a comparison between the Law and the Gospel; for the higher the excellency of Christ’s kingdom than the dispensation of Moses, and the more glorious our calling than that of the ancient people, the more disgraceful and the less excusable is our ingratitude, unless we embrace in a becoming manner the great favor offered to us, and humbly adore the majesty of Christ which is here made evident; and then, as God does not present himself to us clothed in terrors as he did formerly to the Jews, but lovingly and kindly invites us to himself, so the sin of ingratitude will be thus doubled, except we willingly and in earnest respond to his gracious invitation. (260)

Then let us first remember that the Gospel is here compared with the Law; and secondly, that there are two parts in this comparison, — that God’s glory displays itself more illustriously in the Gospel than in the Law, — and that his invitation is now full of love, but that formerly there was nothing but the greatest terrors.

Unto the mount that might be touched, (261) etc. This sentence is variously expounded; but it seems to me that an earthly mountain is set in opposition to the spiritual; and the words which follow show the same thing, that burned with fire, blackness, darkness, tempest, etc.; for these were signs which God manifested, that he might secure authority and reverence to his Law. (262) When considered in themselves they were magnificent and truly celestial; but when we come to the kingdom of Christ, the things which God exhibits to us are far above all the heavens. It hence follows, that all the dignity of the Law appears now earthly: thus mount Sinai might have been touched by hands; but mount Sion cannot be known but by the spirit. All the things recorded in the nineteenth chapter of Exodus 19:1 were visible things; but those which we have in the kingdom of Christ are hid from the senses of the flesh. (263)

Should any one object and say, that the meaning of all these things was spiritual, and that there are at this day external exercises of religion by which we are carried up to heaven: to this I answer, that the Apostle speaks comparatively; and no one can doubt but that the Gospel, contrasted with the Law, excels in what is spiritual, but the Law in earthly symbols.