From John Wilmot’s A Satyr against Reason and Mankind:
Reason, an ignis fatuus of the mind,
Which, leaving light of nature, sense, behind,
Pathless and dangerous wand’ring ways it takes
Through error’s fenny bogs and thorny brakes;
Whilst the misguided follower climbs with pain
Mountains of whimseys, heaped in his own brain;
Stumbling from thought to thought, falls headlong down
Into doubt’s boundless sea where, like to drown,
Books bear him up awhile, and make him try
To swim with bladders of philosophy;
In hopes still to o’ertake th’ escaping light;
The vapour dances in his dazzling sight
Till, spent, it leaves him to eternal night.
Then old age and experience, hand in hand,
Lead him to death, and make him understand,
After a search so painful and so long,
That all his life he has been in the wrong.
Huddled in dirt the reasoning engine lies,
Who was so proud, so witty, and so wise.