Reason, however able, cool at best, Cares not for service, or but serves when pressed, Stays till we call, and then not often near; But honest instinct comes a volunteer, Sure never to o'er-shoot, but just to hit; While still too wide or short is human wit; Sure by quick nature happiness to gain, Which heavier reason labours at in vain, This too serves always, reason never long
 Alexander Pope, An Essay on Man (1734). copy citation

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Author Alexander Pope
Source An Essay on Man
Topic happiness instinct
Date 1734
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/2428/2428-h/2428-h.htm

Context

“Whether with reason, or with instinct blest, Know, all enjoy that power which suits them best; To bliss alike by that direction tend, And find the means proportioned to their end. Say, where full instinct is the unerring guide, What pope or council can they need beside? Reason, however able, cool at best, Cares not for service, or but serves when pressed, Stays till we call, and then not often near; But honest instinct comes a volunteer, Sure never to o'er-shoot, but just to hit; While still too wide or short is human wit; Sure by quick nature happiness to gain, Which heavier reason labours at in vain, This too serves always, reason never long; One must go right, the other may go wrong. See then the acting and comparing powers One in their nature, which are two in ours; And reason raise o'er instinct as you can, In this 'tis God directs, in that 'tis man.” source