Rom 12:1 I appeal to you therefore, brothers, by the mercies of God, to present your bodies as a living sacrifice, holy and acceptable to God, which is your spiritual worship.
about “ living” sacrifice is that it always crawls out from the altar.
when your sin are forgiven you now are without blemish
therefore it is appropriate to present yourself to God as a freewill offering
we can now voluntarily give up ourselves as living sacrifice (not killed offering )
everyday surrendering your will with complete abandonment to the will of God what ever His will is what I will do.