Thematic Bible: Darkness, &c at giving of, illustrative of obscurity of mosaic dispensation

For ye have not come to a mount that is touched and burning with fire, and to blackness, and darkness, and tempest, and the sound of a trumpet, and the voice of words; which voice those who heard entreated that no word more should be added to them; for they could not bear that which was being commanded: "And, if a beast touch the mountain, it shall be stoned"; read more.
and so terrible was the appearance, Moses said, "I am exceedingly frightened and in fear!" But ye have come to Mount Zion, and to the city of the Living God, the Heavenly Jerusalem, and to myriads of angels, to the general festal throng, and assembly of the first-born who are enrolled in Heaven, and to God the Judge of all, and to the spirits of righteous ones made perfect; and to Jesus, the Mediator of a new covenant, and to the blood of sprinkling, speaking better things than Abel.