That a future bodily life is needed in order to give definiteness and solidity to the conception of immortality.
Before the Gospel came men's belief in a future life was vague and powerless, mainly because it had no Gospel of the Resurrection, and so nothing tangible to lay hold on. The Gospel has made the belief in a future state infinitely easier and more powerful, mainly because of the emphasis with which it has proclaimed an actual resurrection and a future bodily life. Its great proof of immortality is drawn, not merely from ethical considerations of the manifest futility of earthly life which has no sequel beyond the grave, nor from the intuitions and longings of men's souls, but from the historical fact of the Resurrection of Jesus Christ, and of His Ascension in bodily form into heaven. It proclaims these two facts as parts of His experience, and asserts that when He rose from the dead and ascended up on high, He did so as the first-born among many brethren,' their forerunner and their pattern. It is this which gives the Gospel its power, and thus transforms a vague and shadowy conception of immortality into a solid faith, for which we have already an historical guarantee. Stupendous mysteries still veil the nature of the resurrection process, though these are exaggerated into inconceivabilities by false notions of what constitutes personal identity; but if the choice lies between accepting the Christian doctrine of a resurrection and the conception of a finite spirit disembodied and yet active, there can be no doubt as to which of these two is the more reasonable and thinkable. Body, soul, and spirit make the complete triune man.
The thought of the future life as a bodily life satisfies the longings of the heart. Much natural shrinking from death comes from unwillingness to part company with an old companion and friend. As Paul puts it in 2nd Corinthians, Not for that we would be unclothed, but clothed upon.' All thoughts of the future which do not give prominence to the idea of a bodily life open up but a ghastly and uninviting mode of existence, which cannot but repel those who are accustomed to the fellowship of their bodies, and they feel that they cannot think of themselves as deprived of that which was their servant and instrument, through all the years of their earthly consciousness.