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—-‘at his bidding speed,
And post o’er land and ocean without rest.’

Others, on the contrary, motionless as statues, that share not in the agitations of their times, that tremble not in sympathy with the storms around them, but that listen–that watch–that wait–for secret indications to be fulfilled, or secret signs to be deciphered. And, of this latter class, he adds-that they, not less than the others, are accepted by God; or, as it is so exquisitely expressed in the closing line,

‘They also serve, that only stand and wait.’

Something analogous to this one may see in the distributions of literature and science. Many popularize and diffuse: some reap and gather on their own account. Many translate, into languages fit for the multitude, messages which they receive from human voices: some listen, like Kubla Khan, far down in caverns or hanging over subterranean rivers, for secret whispers that mingle and confuse themselves with the general uproar of torrents, but which can be detected and kept apart by the obstinate prophetic ear, which spells into words and ominous sentences the distracted syllables of aerial voices. Dr. Nichol is one of those who pass to and fro between these classes; and has the rare function of keeping open their vital communications. As a popularizing astronomer, he has done more for the benefit of his great science than all the rest of Europe combined: and now, when he notices, without murmur, the fact that his office of popular teacher is almost taken out of his hands, (so many are they who have trained of late for the duty,) that change has, in fact, been accomplished through knowledge, through explanations, through suggestions, dispersed and prompted by himself.

For my own part, as one belonging to the laity, and not to the clerus, in the science of astronomy, I could scarcely have presumed to report minutely, or to sit in the character of dissector upon the separate details of Dr. Nichol’s works, either this, or those which have preceded it, had there even been room left disposable for such a task. But in this view it is sufficient to have made the general acknowledgment which already has been made, that Dr. Nichol’s works, and his oral lectures upon astronomy, are to be considered as the fundus of the knowledge on that science now working in this generation. More important it is, and more in reconciliation with the tenor of my own ordinary studies, to notice the philosophic spirit in which Dr. Nichol’s works are framed; the breadth of his views, the eternal tendency of his steps in advance, or (if advance on that quarter, or at that point, happens to be absolutely walled out for the present,) the vigor of the reconnoissances by which he examines the hostile intrenchments. Another feature challenges notice. In reading astronomical works, there arises (from old experience of what is usually most faulty) a wish either for the naked severities of science, with a total abstinence from all display of enthusiasm; or else, if the cravings of human sensibility are to be met and gratified, that it shall be by an enthusiasm unaffected and grand as its subject. Of that kind is the enthusiasm of Dr. Nichol. The grandeurs of astronomy are such to him who has a capacity for being grandly moved. They are none at all to him who has not. To the mean they become meannesses. Space, for example, has no grandeur to him who has no space in the theatre of his own brain. I know writers who report the marvels of velocity, etc., in such a way that they become insults to yourself. It is obvious that in their way of insisting on our earth’s speed in her annual orbit, they do not seek to exalt her, but to mortify you. And, besides, these fellows are answerable for provoking people into fibs:–for I remember one day, that reading a statement of this nature, about how many things the Earth had done that we could never hope to do, and about the number of cannon balls, harnessed as a tandem, which the Earth would fly past, without leaving time to say, How are you off for soap? in vexation of heart I could not help exclaiming–‘That’s nothing: I’ve done a great deal more myself;’ though, when one turns it in one’s mind, you know there must be some inaccuracy there. How different is Dr. Nichol’s enthusiasm from this hypocritical and vulgar wonderment! It shows itself not merely in reflecting the grandeurs of his theme, and by the sure test of detecting and allying itself with all the indirect grandeurs that arrange themselves from any distance, upon or about that centre, but by the manifest promptness with which Dr. Nichol’s enthusiasm awakens itself upon every road that leads to things elevating for man; or to things promising for knowledge; or to things which, like dubious theories or imperfect attempts at systematizing, though neutral as regards knowledge, minister to what is greater than knowledge, viz., to intellectual power, to the augmented power of handling your materials, though with no more materials than before. In his geological and cosmological inquiries, in his casual speculations, the same quality of intellect betrays itself; the intellect that labors in sympathy with the laboring nisus of these gladiatorial times; that works (and sees the necessity of working) the apparatus of many sciences towards a composite result; the intellect that retires in one direction only to make head in another; and that already is prefiguring the route beyond the barriers, whilst yet the gates are locked.