4. The last part of our proposition comes now before us, namely: that the doctrine of the destruction of the universe is opposed to the end of creation, and to the character of God as a Being of unbounded love and infinite wisdom. I may here be told of the tendency of matter to dissolution; of its mutability and constant change; of the elements of destruction which nature herself engenders; and of all those by which reason and science have sought to gloss over the popular tenet. But the _mutability_ of nature is no proof of final dissolution. _Mutability_ is liability to change, or a continual tendency to remove from one state to another. Whatever is changeable, or whatever can experience alteration, is, therefore, mutable. But this mutability attaches not to material nature alone, but to all creation; the highest archangel in the highest heaven, as well as every spirit embodied on earth, is a mutable creature. The state of glory in the eternal world, as well as the state of man below, is a state of _mutability_,--a state in which there are continual changes either for the better or the worse. This will appear plain if we consider that, whatever is immutable cannot be acted upon by any higher power; for the action of such a superior cause supposes a corresponding _effect_ and that effect supposes a _change_ in the object acted upon, in one way or another; and, consequently, any object upon which an effect can be produced, must be a mutable or changeable object. Now, in the case of angelic beings, God, the First Cause of their existence, is continually acting upon them by his love and wisdom, and thus raising them eternally in the scale of blessedness: such alteration of their state from glory to glory is a change,--an effect produced upon them by an Almighty Cause; and this effect is at once a proof that angels themselves are _mutable_ creatures, or liable to change. The same may be said of the state of blessedness; it is continually receiving fresh supplies of glory from the Fountain of life, and is thus _changing_--becoming more and more blessed: and it equally applies to the spirit of man. This, like the mind, is never "at one stay;" nor, perhaps, does the state of the mind remain precisely the same for two hours together. The angels of heaven, the state of the blessed, the spirit of man, are all changeable. God is the _only immutable Being_; for He alone cannot be acted upon or changed by any higher power; and hence it is one of his exclusive prerogatives to be "without variableness or shadow of turning." If, then, the angelic hosts, as well as heaven itself, are mutable, while yet they endure for ever, the mutability of nature is no proof at all that she, any more than the former, is approaching dissolution.