For those who, like myself, are the mere irresponsible camp-followers of science, the importance of any given solution seems often to be less in what it actually teaches us, than in what it allows us indirectly to guess at. The new fact may or may not be important, but the ideas that it starts in our minds can hardly fail to be so. In the imaginative realm there is literally no limit to the revelations to which the tiniest of natural phenomena may not serve as an introduction. The fact itself may be the minutest of facts; a mere pin-point, a scarce perceptible chink of light, but it is a chink in the walls as it were of a great cathedral of discovery, the doors of which may, for anything one knows to the contrary, be thrown widely open to oneself, and to everyone else to-morrow.
This, if I am not misleading myself, is the real attractiveness of every pursuit which has the elucidation of Nature for its end and aim; one perhaps most felt, or at all events most enjoyed, by the more ignorant of her votaries. Properly directed ignorance is in truth a most desirable haze, and when some stray beam does traverse its obscurity, how great is the illumination which follows! What may not be possible where there is no dead-weight of fact to keep our feet upon the solid earth; no panoply of unescapable knowledge to bid our pleasant fancies nay?
Even for those less comfortably unfettered by circumstances, it must be an alleviation surely of the prose of life that in this region of the ideas no man can ever positively say what may not be in store for him. However tame, however dull his foreground, there is always the chance of something ahead; something that when it comes, will sweep his thoughts away with it to the very verge of the horizon. There is never a day, there is hardly an hour, in which some new idea may not be upon its road. Now a really new idea for the time being remakes life. It is a solvent which dissolves all old impressions, and rebuilds them anew. Men live by ideas, as surely, almost as literally, as they live by bread, and a world into which no new idea ever entered would be a dead world, tenanted only by corpses.
The strange thing is that we should any of us doubt this, or that in those innermost citadels which we call our brains, we should really very greatly care about anything else. Surely for people so oddly circumstanced as ourselves the quest for ideas, ever larger, ever more comprehensive ideas, is the only perfectly rational occupation? Stranded upon the shores of the Unknown; rocked to and fro by all the winds of mystery; ignorant of whence precisely we came, whither precisely we are going; for people in so strange a position as this to be continually on the quest for some new intimation, for some further hint, or indication, seems as natural as for shipwrecked sailors to be for ever on the watch for sails.