Repentance and seperation from the sins of our culture are different for various locations in the world today as it was in the OT.
For Daniel in Exile it was certainly different than for Kings David. Not too sure what the question is getting at it is our sin not the sin of the culture. The sin of the culture may make it more difficult for us to stand for God as it was for Daniel and now for more and more of us as the church is being demonised by various cultures.
It was easier to attend Sunday worship 60 years ago when most families went and there was no sport or business tradeon Sundays. But David's sin of **** was not prevented by his living in Israel
Today we are called our of this world by the indwelling Spirit, and we apporach the throne of grace through the certainly of the blood of Christ, which is a greater covenant than that of Sinai.
We prepare for worship and for the Lord's supper not by having made ourselves clean but by repenting of our sins, asking our heavenly Father to be gracious and merciful to us and ( Not a distant idea but our father by new birth of water and Word) to forgive us for the sake of Jesus Christ and claiming his righteousness.
So Repentance looks a lot more personal and direct than being mediated by temple priest but by the Great High priest Jesus who by his perfect obedience is both our sacrifice and saviour.
We go to the table with confidence and at peace with others - if this is not the case then we are called to leave our gift at the altar and make peace with our brother/ sister.
We recieve Christ at the table in faith and expectation - not with fear for if we confess our sins he is surely merciful. We belong at the table but we have not earned a place at the table - that is always grace.
We serve God in purity in the grace of our baptism, in seeking his will in his word and being guided to avoid sinning but also to repent of our sins.
