But it does not follow that the dumb and silent pleading of the former (though sometimes, nay often mistaken) is less true than that of its babbling interpreter, or that we are never to trust its dictates without consulting the express authority of reason. Both are imperfect, both are useful in their way, and therefore both are best together, to correct or to confirm one another. It does not appear that in the singular instance above mentioned, the sudden impression on the mind was superstition or fancy, though it might have been thought so, had it not been proved by the event to have a real physical and moral cause. Had not the same face returned again, the doubt would never have been properly cleared up, but would have remained a puzzle ever after, or perhaps have been soon forgot.—By the law of association, as laid down by physiologists, any impression in a series can recal any other impression in that series without going through the whole in order: so that the mind drops the intermediate links, and passes on rapidly and by stealth to the more striking effects of pleasure or pain which have naturally taken the strongest hold of it. By doing this habitually and skilfully with respect to the various impressions and circumstances with which our experience makes us acquainted, it forms a series of unpremeditated conclusions on almost all subjects that can be brought before it, as just as they are of ready application to human life; and common sense is the name of this body of unassuming but practical wisdom. Common sense, however, is an impartial, instinctive result of truth and nature, and will therefore bear the test and abide the scrutiny of the most severe and patient reasoning. It is indeed incomplete without it. By ingrafting reason on feeling, we ‘make assurance double sure.’ ‘’Tis the last key-stone that makes up the arch— Then stands it a triumphal mark! Then men Observe the strength, the height, the why and when It was erected: and still walking under, Meet some new matter to look up, and wonder.’