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

For you have not come to something that can be touched, and to a burning fire, and to darkness, and to gloom, and to a whirlwind, and to the noise of a trumpet, and to the sound of words which those who heard begged [that] not [another] word be spoken to them. For they could not endure what was commanded: "If even an animal touches the mountain, it must be stoned." read more.
And the spectacle was so terrifying [that] Moses said, "I am terrified and trembling." But you have come to Mount Zion, and to the city of the living God, to the heavenly Jerusalem, and to tens of thousands of angels, to the festal gathering and assembly of the firstborn who are enrolled in heaven, and to God the judge of all, and to the spirits of righteous [people] made perfect, and to Jesus, the mediator of a new covenant, and {to the sprinkled blood} that speaks better than Abel's [does].