Strange difficulties have been raised by some concerning personal identity, or the sameness of living agents, implied in the notion of our existing now and hereafter, or in any two successive moments; which, whoever thinks it worth while, may see considered in the first dissertation at the end of this treatise. But without regard to any of them here, let us consider what the analogy of nature, and the several changes which we have undergone, and those which we know we may undergo without being destroyed, suggest, as to the effect which death may, or may not, have upon us; and whether it be not from thence probable, that we may survive this change, and exist in a future state of life and perception. I. From our being born into the present world in the helpless imperfect state of infancy, and having arrived from thence to mature age, we find it to be a general law of nature in our own species, that the same creatures, the _same individuals_, should exist in degrees of life and perception, with capacities of action, of enjoyment and suffering, in one period of their being, greatly different from those appointed them in another period of it. In other creatures the same law holds. For the difference of their capacities and states of life at their birth (to go no higher) and in maturity; the change of worms into flies, and the vast enlargement of their locomotive powers by such change: and birds and insects bursting the shell of their habitation, and by this means entering into a new world, furnished with new accommodations for them, and finding a new sphere of action assigned them; these are instances of this general law of nature. Thus all the various and wonderful transformations of animals are to be taken into consideration here. The states of life in which we ourselves existed formerly, in the womb and in our infancy, are almost as different from our present in mature age, as it is possible to conceive any two states or degrees of life can be. Therefore that we are to exist hereafter, in a state as different (suppose) from our present, as this is from our former, is but according to the analogy of nature; according to a natural order or appointment of the very same kind, with what we have already experienced.