Notwithstanding the unparalleled emphasis upon this term in the Christian system, there is none more feebly expressive to the ordinary mind. That mystery which surrounds the word in the natural world shrouds only too completely its spiritual import. The reluctance which prevents men from investigating the secrets of the King of Terrors is for a certain length entitled to respect. But it has left theology with only the vaguest materials to construct a doctrine which, intelligently enforced, ought to appeal to all men with convincing power and lend the most effective argument to Christianity. Whatever may have been its influence in the past, its threat is gone for the modern world. The word has grown weak. Ignorance has robbed the Grave of all its terror, and platitude despoiled Death of its sting. Death itself is ethically dead. Which of us, for example, enters fully into the meaning of words like these: "She that liveth in pleasure is _dead_ while she liveth?" Who allows adequate weight to the metaphor in the Pauline phrase, "To be carnally minded is _Death_;" or in this, "The wages of sin is _Death_?" Or what theology has translated into the language of human life the terrific practical import of "Dead in trespasses and sins?" To seek to make these phrases once more real and burning; to clothe time-worn formulæ with living truth; to put the deepest ethical meaning into the gravest symbol of Nature, and fill up with its full consequence the darkest threat of Revelation--these are the objects before us now. What, then, is Death? Is it possible to define it and embody its essential meaning in an intelligible proposition? The most recent and the most scientific attempt to investigate Death we owe to the biological studies of Mr. Herbert Spencer. In his search for the meaning of Life the word Death crosses his path, and he turns aside for a moment to define it. Of course what Death is depends upon what Life is. Mr. Herbert Spencer's definition of Life, it is well known, has been subjected to serious criticism. While it has shed much light on many of the phenomena of Life, it cannot be affirmed that it has taken its place in science as the final solution of the fundamental problem of biology. No definition of Life, indeed, that has yet appeared can be said to be even approximately correct. Its mysterious quality evades us; and we have to be content with outward characteristics and accompaniments, leaving the thing itself an unsolved riddle. At the same time Mr. Herbert Spencer's masterly elucidation of the chief phenomena of Life has placed philosophy and science under many obligations, and in the paragraphs which follow we shall have to incur a further debt on behalf of religion.