John Chrysostom
Do you see to what height the power of the cross raised the Apostle? It not only made all worldly things dead for him, but also set him incomparably above his former life. What power can equal this power of the cross? He who formerly submitted to death and put others to death for circumcision was taught by the cross to count circumcision the same as uncircumcision. He was taught to seek new, wondrous, and heavenly works. By "new creation" he means our life, both in relation to what has already taken place and in relation to what is still to take place. In relation to what has taken place, our soul, grown old in sin, was suddenly renewed through baptism, as though created anew. Therefore a new and heavenly manner of life is also required of us. In relation to the future, heaven and earth, and finally all creation together with our bodies, must pass into the state of incorruption.