"You have not had to approach things which your senses could experience as they did in the old days — flaming fire, black darkness, rushing wind and out of it a trumpet-blast, a voice speaking human words. So terrible was that voice that those who heard it begged and prayed that it might stop speaking, for what it had already commanded was more than they could bear — ‘And if so much as a beast touches the mountain, it shall be stoned or thrust through with an arrow.' So fearful was the spectacle that Moses cried out, ‘I am exceedingly afraid and trembling.'" Hebrews 12:18-21
The reference here, obviously, is to both Moses and the Israelites' experience of the Presence of God on and around the environs of Mount Sinai. And what, are we told, was that experience like?
Flaming fire, black darkness, rushing wind, a trumpet-blast, a voice speaking human words that was so awesome that those who heard it begged and prayed that it would stop: overall, a spectacle so fearful that it terrified and caused trembling.
And what do you think made all of that so stupendously frightening? Well, put yourself in those people's shoes. They were going along through their lives, being about the business of their days, when all of the above suddenly happened to them, from the outside, absolutely externally. Normal human life was accosted by the full weight of the eternal.
So what is - what should be - the difference now for us? Only, really, the location of all that. For we too – and the Church ever since Pentecost – have been lit with flaming fire, brought out of the black darkness into light; we have heard and received the rushing wind of the Spirit who summons and sends like a trumpet-blast; we have heard the Voice speaking human words to us – so wonderful that we’ve begged and prayed that it might never stop, so awesome that it terrifies and causes us to tremble – and where has all this occurred?
Internally. Within. Inside us. Right inside the chest of the reader now reading this sentence.
One of the greatest differences between the Old and New Testaments is simply the stage upon which the drama then/now occurs. Now, the normal human life of the followers of Jesus of Nazareth has been invaded and infused by the full weight of the eternal. Your human spirit is this generation's Mount Sinai: the sights, the sounds, the words of the Kingdom of Heaven on display.