But "Hold!" says the reader, especially if he be one who loves science, who loves to feel the firm ground under his feet, "That the species has a great future before it we may well believe; already we see the indications. But that the individual has is quite another matter. We can but balance probabilities here, and the probabilities are very heavy on the wrong side; the poets must throw in weighty matter indeed to turn the scale the other way!" Be it so: but ponder a moment what science herself has to say bearing on this theme; what are the widest, deepest facts she has reached down to. INDESTRUCTIBILITY: Amidst ceaseless change and seeming decay all the elements, all the forces (if indeed they be not one and the same) which operate and substantiate those changes, imperishable; neither matter nor force capable of annihilation. Endless transformations, disappearances, new combinations, but diminution of the total amount never; missing in one place or shape to be found in another, disguised ever so long, ready always to re-emerge. "A particle of oxygen," wrote Faraday, "is ever a particle of oxygen; nothing can in the least wear it. If it enters into combination and disappears as oxygen, if it pass through a thousand combinations, animal, vegetable, mineral--if it lie hid for a thousand years and then be evolved, it is oxygen with its first qualities neither more nor less." So then out of the universe is no door. CONTINUITY again is one of Nature's irrevocable words; everything the result and outcome of what went before; no gaps, no jumps; always a connecting principle which carries forward the great scheme of things as a related whole, which subtly links past and present, like and unlike. Nothing breaks with its past. "It is not," says Helmholtz, "the definite mass of substance which now constitutes the body to which the continuance of the individual is attached. Just as the flame remains the same in appearance and continues to exist with the same form and structure although it draws every moment fresh combustible vapour and fresh oxygen from the air into the vortex of its ascending current; and just as the wave goes on in unaltered form and is yet being reconstructed every moment from fresh particles of water, so is it also in the living being. For the material of the body like that of flame is subject to continuous and comparatively rapid change--a change the more rapid the livelier the activity of the organs in question. Some constituents are renewed from day to day, some from month to month, and others only after years. That which continues to exist as a particular individual is, like the wave and the flame, only the _form of motion_ which continually attracts fresh matter into its vortex and expels the old. The observer with a deaf ear recognizes the vibration of sound as long as it is visible and can be felt, bound up with other heavy matter. Are our senses in reference to life like the deaf ear in this respect?"