Why then should we so presume that our moral and religious ideas are really progressive and not regressive, as to regard their interpretation as approximating to the truth? The answer is simply that our argument from adaptability does not require the assumption in question, but only that we should be able to distinguish higher from lower tendencies, progressive from regressive movements, without holding the optimistic view that on the whole the forward tendency is at present prevailing. It is not because we live in the nineteenth century that we consider our moral perceptions truer than those of the ancient Hebrews, but because we at once comprehend and transcend their ideas (in some respects), as the greater does the less. In many points surely the relation is inverted and we feel ourselves transcended (or may at least suspect it), by those who lived or live in ruder conditions than our own. David has perhaps taught us more than we could have taught him; and there are other vices than those proper to semi-barbarism. It is not by reference to date or country, or grade of material progress, that we assess the value of moral judgments, but by that subjective standard with which our own moral attainments supply us in regard to all that is equal or less, similar or dissimilar. To deny this discernment is to throw the doors open to unqualified scepticism; to admit it, is all that we need for the validity of our inference. 4. If Evolution is really of this oscillatory character; if at all times much the same processes have been going on in different parts of this universe as now--one system decaying as another is coming into being; is it not more reasonable to imagine (for it is only a question of imagining) that the primordial datum was not uniform nebula, but matter in all stages of elaboration from the highest to the lowest--the same sort of result as we should get from a cross-section at any subsequent moment in the process? What reason is there for assuming primordial homogeneity, since every backward step would show us, together with the unravelling of what is now in process of weaving, a counter-balancing weaving of what is now in process of disintegration? Were this earth all, we might dream of universal advance by shutting our eyes to a great many incompatible facts; but when our telescopes show us the co-existence of integration and disintegration everywhere, what can we conclude but that in the past as in the future, no alteration is to be looked for beyond the shifting of the waves' crest from side to side of the sea of matter--the total ratio of depressions to elevations remaining exactly constant.