Between these two limits all knowledge is forever moving. It can never rest. The tide of thought sweeps onward towards the infinite--God following it to its final absorption into the _I Am_, simple being,--while finite man, because of his finiteness, can only reach those universals which are infinite only to human thought. Like men on a journey we leave the train when we have reached our journey's end, but the train passes on out of sight in the distance, sending back, now and then, tokens of its progress, as it thunders over a bridge, or whistles shrill as it nears some further stopping place, until at last all is still, not because the train has stopped, but because we can follow it no further with our senses. Even after science has reached the utmost limit possible to it, it is not satisfied to rest there, but starts at once upon its return trip, to bring to notice undiscovered facts hidden in these mighty generalizations. Thus the pendulum of intellectual activity unceasingly vibrates between the infinite and the finite, never resting, because Idea and Matter, the force of Man and the force of Nature can never be completely identified. THE PHILOSOPHY OF EVOLUTION. The intellectual processes of a rational being must proceed according to some law. They cannot succeed each other at hap-hazard. The notion of rationality is conditioned upon this regular procedure; if this be wanting, the essential character of rational action is wanting. But to say that rational processes are determined by law, and conditioned upon a regular procedure, is simply to assert that the steps in ratiocination are so related to each other that the relation of each to every other may be determined by the application of the law--the difference between any two steps being analogous to the difference between any other two. The astronomer determines the orbit of a planet from three observations, because he thereby determines the law of variation between these points; from which he assumes that this law will be constant, presenting a series of terms each differentiated according the series of differences already determined.