I beseech you therefore, brethren, by the mercies of God, that you present your bodies a living sacrifice, holy, acceptable to God, which is your reasonable service.  And do not be conformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.  For I say, through the grace given to me, to everyone who is among you, not to think of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith.  For as we have many members in one body, but all the members do not have the same function, so we, being many, are one body in Christ, and individually members of one another. 
Romans 12:1-5