40 We see, then, that this death is a gain and life a penalty, so that Paul says: “To me to live is Christ and to die is gain.” What is Christ but the death of the body, the breath of life? And so let us die with Him, that we may live with Him. Let there then be in us as it were a daily practice and inclination to dying, that by this separation from bodily desires, of which we have spoken, our soul may learn to withdraw itself, and, as it were placed on high, when earthly lusts cannot approach and attach it to themselves, may take upon herself the likeness of death, that she incur not the penalty of death. For the law of the flesh wars against the law of the mind, and makes it over to the law of error, as the Apostle has made known to us, saying: “For I see a law of the flesh in my members warring against the law of my mind, and bringing me into captivity in the law of sin.” We are all attached, we all feel this; but we are not all delivered. And so a miserable man am I, unless I seek the remedy.
Source: On the Death of Satyrus (New Advent)