Paul writes to the Christian believers gathered in Rome about the gospel of God in Jesus Christ which they have believed and which is the power of God by which all things are restored:
Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ. … For while we were still weak, at the right time Christ died for the ungodly. … but God shows his love for us in that while we were still sinners, Christ died for us. Since, therefore, we have now been justified by his blood, how much more shall we be saved by him from the wrath of God? For it while we were enemies we were reconciled to God by the death of his Son, much more, now that we are reconciled, shall we be made alive and made whole by his life. (Romans 5:1, 6, 8-10)
There you have it: we come boldly, with confidence and rejoicing, into the presence of the living and holy God to worship, fellowship, and serve together not on the basis of our great wisdom, intellect, abilities, or achievements, but upon the basis of the gift of God’s astounding grace in Jesus Christ alone. If he has granted that gift so generously to us while we were his enemies, how much more, now that we are his friends – yea, even his children in whom he has declared his good pleasure – will he take pleasure in our presence and pour out upon us the riches of his mercy and grace through Jesus Christ? In that confidence, then, let us come together with rejoicing and thanksgiving and worship – and so bear witness to the glory of God’s grace in Jesus Christ!