John Chrysostom

By the "sleeper" and the "dead," he means the man that is in sin; for he both exhales noisome odors like the dead, and is inactive like one that is asleep, and like him he sees nothing, but is dreaming, and forming fancies and illusions. Some indeed read, "And thou shalt touch Christ"; but others, "And Christ shall shine Upon thee"; and it is rather this latter. Depart from sin, and thou shalt be able to behold Christ. "For every one that doeth ill, hateth the light, and cometh not to the light." (John iii. 20.) He therefore that doeth it not, cometh to the light.

Now he is not saying this with reference to the unbelievers only, for many of the faithful, no less than unbelievers, hold fast by wickedness; nay, some far more. Therefore to these also it is necessary to exclaim, "Awake, thou that sleepest, and arise from the dead, and Christ shall shine upon thee." To these it is fitting to say this also, "God is not the God of the dead, but of the living." (Matt. xxii. 32.) If then he is not the God of the dead, let us live.