The Power of the Cross

Galatians 6:14 But God forbid that I should glory, save in the cross of our Lord Jesus Christ, by whom the world is crucified unto me, and I unto the world. 15 For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creature. 16 And as many as walk according to this rule, peace be on them, and mercy, and upon the Israel of God.