You have not come to something that can be touched, a blazing fire, and darkness, and gloom, and a tempest, and the sound of a trumpet, and a voice whose words made the hearers beg that not another word be spoken to them. (For they could not endure the order that was given, "If even an animal touches the mountain, it shall be stoned to death." Indeed, so terrifying was the sight that Moses said, "I tremble with fear.") But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to innumerable angels in festal gathering, and to the assembly of the firstborn who are enrolled in heaven, and to God the judge of all, and to the spirits of the righteous made perfect, and to Jesus, the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel. (Hebrews 12:18-24, NRSV)
Ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest, And the sound of a trumpet, and the voice of words; which voice they that heard intreated that the word should not be spoken to them any more: (For they could not endure that which was commanded, And if so much as a beast touch the mountain, it shall be stoned, or thrust through with a dart: And so terrible was the sight, that Moses said, I exceedingly fear and quake:) But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels, To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect, And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel. (Hebrews 12:18-24, KJV)
In Exodus, the people are pretty frightened of God up there on Mount Sinai. But now, God has dropped his scary mountain-shaking act. Because of Jesus, God has become approachable and kind, and believers don't have to be so freaked out anymore.