"If a drunkard..."

"If a drunkard in a sober fit is the dullest of mortals, an enthusiast in a reason fit is not the most lively.  And this, without prejudice to his greatly improved understanding; for, if in his elation was the height of his madness, his despondency is but the extreme of his sanity."- Herman Melville from The Confidence Man: His Masquerade