romans 12:1 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service. - Free Bible Online

      Ro 12:1-21. DUTIES OF BELIEVERS, GENERAL AND PARTICULAR.

      The doctrinal teaching of this Epistle is now followed up by a series of exhortations to practical duty. And first, the all-comprehensive duty.

      1. I beseech you therefore--in view of all that has been advanced in the foregoing part of this Epistle.
      by the mercies of God--those mercies, whose free and unmerited nature, glorious Channel, and saving fruits have been opened up at such length.
      that ye present--See on Ro 6:13, where we have the same exhortation and the same word there rendered "yield" (as also in Ro 12:16, 19).
      your bodies--that is, "yourselves in the body," considered as the organ of the inner life. As it is through the body that all the evil that is in the unrenewed heart comes forth into palpable manifestation and action, so it is through the body that all the gracious principles and affections of believers reveal themselves in the outward life. Sanctification extends to the whole man (1Th 5:23, 24).
      a living sacrifice--in glorious contrast to the legal sacrifices, which, save as they were slain, were no sacrifices at all. The death of the one "Lamb of God, taking away the sin of the world," has swept all dead victims from off the altar of God, to make room for the redeemed themselves as "living sacrifices" to Him who made "Him to be sin for us"; while every outgoing of their grateful hearts in praise, and every act prompted by the love of Christ, is itself a sacrifice to God of a sweet-smelling savor (Heb 13:15, 16).
      holy--As the Levitical victims, when offered without blemish to God, were regarded as holy, so believers, "yielding themselves to God as those that are alive from the dead, and their members as instruments of righteousness unto God," are, in His estimation, not ritually but really "holy," and so
      acceptable--"well-pleasing"
      unto God--not as the Levitical offerings, merely as appointed symbols of spiritual ideas, but objects, intrinsically, of divine complacency, in their renewed character, and endeared relationship to Him through His Son Jesus Christ.
      which is your reasonable--rather, "rational"
      service--in contrast, not to the senselessness of idol-worship, but to the offering of irrational victims under the law. In this view the presentation of ourselves, as living monuments of redeeming mercy, is here called "our rational service"; and surely it is the most rational and exalted occupation of God's reasonable creatures. So 2Pe 1:5, "to offer up spiritual sacrifices, acceptable to God through Jesus Christ."

JFB.