Jesus' death is a gift for those who will ask for it. Though his death, you can be forgiven for your sins if you ask and accept the fact that jesus is your savior. If you do these your sins will be for given and you can be cleansed with the blood of your savior. If your die with jesus as your savior(clean) then you can ascend into his holy place for eternity.
by unclean, I meant impure