To this test let every man bring his imaginations, before they have been too long predominant in his mind. Whatever is true will bear to be related, whatever is rational will endure to be explained; but when we delight to brood in secret over future happiness, and silently to employ our meditations upon schemes of which we are conscious that the bare mention would expose us to derision and contempt; we should then remember, that we are cheating ourselves by voluntary delusions; and giving up to the unreal mockeries of fancy, those hours in which solid advantages might be attained by sober thought and rational assiduity. There is, indeed, so little certainty in human affairs, that the most cautious and severe examiner may be allowed to indulge some hopes which he cannot prove to be much favoured by probability; since, after his utmost endeavours to ascertain events, he must often leave the issue in the hands of chance. And so scanty is our present allowance of happiness, that in many situations life could scarcely be supported, if hope were not allowed to relieve the present hour by pleasures borrowed from futurity; and reanimate the languor of dejection to new efforts, by pointing to distant regions of felicity, which yet no resolution or perseverance shall ever reach. But these, like all other cordials, though they may invigorate in a small quantity, intoxicate in a greater; these pleasures, like the rest, are lawful only in certain circumstances, and to certain degrees; they may be useful in a due subserviency to nobler purposes, but become dangerous and destructive when once they gain the ascendant in the heart: to soothe the mind to tranquillity by hope, even when that hope is likely to deceive us, may be sometimes useful; but to lull our faculties in a lethargy is poor and despicable. Vices and errours are differently modified, according to the state of the minds to which they are incident; to indulge hope beyond the warrant of reason, is the failure alike of mean and elevated understandings; but its foundation and its effects are totally different: the man of high courage and great abilities is apt to place too much confidence in himself, and to expect, from a vigorous exertion of his powers, more than spirit or diligence can attain: between him and his wish he sees obstacles indeed, but he expects to overleap or break them; his mistaken ardour hurries him forward; and though, perhaps, he misses his end, he nevertheless obtains some collateral good, and performs something useful to mankind, and honourable to himself.