But there is a more peculiar change of a higher order still, that which we speak of as development, evolution, growth. This sort of change might be described as movement toward a mark. When the seed begins to be transformed in the earth, it is adapted not merely to the next stage; but that stage has reference to one farther on, and that to still others. It would hardly be a metaphor to declare that the whole elm is already prophesied when its seed is laid in the earth. For though the entire tree is not there, though in order that the seed may become an elm it must have a helpful environment, still a certain plan of movement elmwards is, we may say, already schemed in the seed. Here accordingly, change--far from being a loss--is a continual increment and revelation. And since the later stages successively disclose the meaning of those which went before, these later stages might with accuracy he styled the truth of their predecessors, and those be accounted in comparison trivial and meaningless until thus changed. This sort of change carries its past along with it. In the destructive changes which we were lamenting a moment ago, the past was lost and the new began as an independent affair. Even in chemic change this was true to a certain extent. Yet there, though the past was lost, a future was prophesied. In the case of development the future, so far from annihilating the past, is its exhibition on a larger scale. The full significance of any single stage is not manifest until the final one is reached. I suppose when we arrive at this thought of change as expressing development, our lamentation may well turn to rejoicing. Possibly this may be the reason why the gloom which is a noticeable feature of the thought of many preceding centuries has in our time somewhat disappeared. While our ambitions are generally wider, and we might seem, therefore, more exposed to disappointment, I think the last half of the century which has closed has been a time of large hopefulness. Perhaps it has not yet gone so far as rejoicing, for failure and sorrow are still by no means extirpated. But at least the thoughts of our day have become turned rather to the future than the past, a result which has attended the wider comprehension of development. To call development the discovery of our century would, however, be absurd. Aristotle bases his whole philosophy upon it, and it was already venerable in his time. Yet the many writers who have expounded the doctrine during the last fifty years have brought the thought of it home to the common man. It has entered into daily life as never before, and has done much to protect us against the sadness of destructive change. Perceiving that changes, apparently destructive, repeatedly bring to light meaning previously undisclosed, we more willingly than our ancestors part with the imperfect that a path to the perfect may be opened.