Hello I believe,

I think that the main reason that Jesus was with us during 33 years: to herald 'the kingdom of the Lord'.

One time the Lord will do away all sins done in the whole wide world during all the time from Adam to the end of 'the thousand years'.
He will do that following Matthew 25 through his son Jesus Christ.

All the sins, not given by the sinners to Jesus to carry them away.......
what he did in fact at Golgotha, where he was burdened with all the sins of all the members of Mankind, passed, present and coming.
.....will then disappear in a sad way . Those, who dit not accept the offer of Jesus:
`Give it all to me`,
will go with their sins to eternity to pay for it, what they never can .

And then the whole saved world will be only harmony and God will form it to what he had always in mind.
This is the kingdom of God and Jesus proclaimed it all his days and we , his servants, proclaim it today.

Greeting
Ger