This passage in Hebrews (12:18-24) goes on to tell us that as we gather here with the great assembly of saints and angels before God’s throne, our worship and our communing with Jesus is shaking up the unbelieving world around us. It is another great blow against the walls of Hades which will not be able to prevail. We come in victory to proclaim that victory and to call upon God to spread His victory – Thy kingdom come, thy will be done on earth as it is in heaven – we cry.
We see what life is like in heaven as we look to Jesus – and then we say, Yes, Lord, do that here too.
And through our singing to one another, through our praise and worship of God, through our observance of the sacraments of baptism and the Lord’s supper, through the Word preached and received, through our prayers and offerings – God accomplishes all that He promises He would. What happens here will make earth-shaking differences, to the glory of God, over the rest of the world in real time and space.
The veil has been torn, you have entered into heaven, you have come to Jesus the Mediator of the new covenant – and He is pleased to hear your praise and prayers. But you must come with faith – you must come believing. And if believing, then it only follows that we must stop and confess our sins before this mighty and holy God.