Romans 12:2-5

And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect. For through the grace given to me I say to everyone among you not to think more highly of himself than he ought to think; but to think so as to have sound judgment, as God has allotted to each a measure of faith. For just as we have many members in one body and all the members do not have the same function, so we, who are many, are one body in Christ, and individually members one of another.