For ye are not come unto the mount that might be touched, and that burned with fire, nor unto blackness, and darkness, and tempest…But ye are come unto mount Sion… – Hebrews 12:18, 22

We are joyfully reminded by the apostle that we have not come to Mount Sinai and its overwhelming manifestations…We have not come to the dread and terror of the old covenant, of which our apostle says in another place, “The covenant from the Mount Sinai genders to bondage” (Galatians 4:24). Upon the believer’s spirit there rests not the slavish fear, the abject terror, the fainting alarm, which swayed the tribes of Israel, for the manifestation of God which he beholds, though not less majestic, is far fuller of hope and joy. Over us there rests not the impenetrable cloud of apprehension, we are not buried in a present darkness of despair, we are not tossed about with a tempest of horror, and therefore, we do not exceedingly fear and quake. How thankful we should be for this! We are come to a more joyous sight than Sinai, and the mountain burning with fire…The believer in the Lord Jesus Christ lives in quite another atmosphere. He has not come to a barren crag, but to an inhabited city, Jerusalem above, the metropolis of God. He has left the wilderness for the land which flows with milk and honey, and the material mount which might be touched for the spiritual and heavenly Jerusalem. He has entered into fellowship with an innumerable company of angels, who are to him, not cherubim with flaming swords to keep men back from the tree of life, but ministering spirits sent forth to minister to the heirs of salvation. He is come to the joyous assembly of all pure intelligences who have met, not in trembling, but in joyous liberty, to keep the feast with their great Lord and King. He thinks of all who love God throughout all worlds, and he feels that he is one of them, for he has come to “the general assembly and Church of the first-born, which are written in heaven.” God is not to them a dreadful person who speaks from a distance, but He is their Father and their Friend, in whom they delight themselves, in whose presence there is fullness of joy for them. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1888.cfm