Man consists of body and soul, and provision is made for the happiness of both.
(a) For the body; here is the promise of a blessed resurrection. Though the body be dead because of sin (there is no remedy but it will die), yet it shall live again. All the difficulties that attend the state of the dead are here overlooked, and made nothing of. Though the sentence of death was just, though the effects of death be dismal, though the bands of death be strong, though he be dead and buried, dead and putrefied, though the scattered dust be so mixed with common dust that no art of man can distinguish, much less separate them, put the case as strongly as you will on that side, yet we are sure that he shall live again: the body shall be raised a glorious body.
(b.) For the soul; here is the promise of a blessed immortality. He that liveth and believeth, who, being united to Christ by faith, lives spiritually by virtue of that union, he shall never die. That spiritual life shall never be extinguished, but perfected in eternal life. As the soul, being in its nature spiritual, is therefore immortal; so if by faith it live a spiritual life, consonant to its nature, its felicity shall be immortal too. It shall never die, shall never be otherwise than easy and happy, and there is not any intermission or interruption of its life, as there is of the life of the body.
The mortality of the body shall at length be swallowed up of life; but the life of the soul, the believing soul, shall be immediately at death swallowed up of immortality. He shall not die, eis ton aiōna, for ever - Non morietur in aeternum; so Cyprian quotes it. The body shall not be for ever dead in the grave; it dies (like the two witnesses) but for a time, times, and the dividing of time; and when time shall be no more, and all the divisions of it shall be numbered and finished, a spirit of life from God shall enter into it.
But this is not all; the souls shall not die that death which is for ever, shall not die eternally, Blessed and holy, that is, blessed and happy, is he that by faith has part in the first resurrection, has part in Christ, who is that resurrection; for on such the second death, which is a death for ever, shall have no power; see Joh 6:40.