Ambrose of Milan

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.