13 It is this preaching of the double aspect of Christ's Person which the blessed Apostle emphasises. He points out in Christ His human infirmity, and His divine power and nature. Thus to the Corinthians he writes, For though He was crucified through weakness, yet He lives through the power of God, attributing His death to human infirmity, but His life to divine power: and again to the Romans, For the death, that He died unto sin, He died once: but the life, that He lives, He lives unto God. Even so reckon ye yourselves also to be dead unto sin, but alive unto God in Christ Jesus, ascribing His death to sin, that is, to our body, but His life to God, Whose nature it is to live. We ought, therefore, he says, to die to our body, that we may live to God in Christ Jesus, Who after the assumption of our body of sin, lives now wholly unto God, uniting the nature He shared with us with the participation of divine immortality.
Source: On the Trinity (New Advent)