Make use of every friend--and every foe.

A little learning is a dangerous thing;
Drink deep, or taste not the Pierian spring:
There shallow draughts intoxicate the brain,
And drinking largely sobers us again.
Fired at first sight with what the Muse imparts,
In fearless youth we tempt the heights of arts, 220
While from the bounded level of our mind,
Short views we take, nor see the lengths behind;
But, more advanced, behold with strange surprise,
New distant scenes of endless science rise!
So, pleased at first the towering Alps we try,
Mount o'er the vales, and seem to tread the sky,
The eternal snows appear already past,
And the first clouds and mountains seem the last:
But, those attain'd, we tremble to survey
The growing labours of the lengthen'd way, 230
The increasing prospect tires our wandering eyes,
Hills peep o'er hills, and Alps on Alps arise!

A perfect judge will read each work of wit
With the same spirit that its author writ:
Survey the WHOLE, nor seek slight faults to find
Where nature moves, and rapture warms the mind;
Nor lose, for that malignant dull delight,
The generous pleasure to be charm'd with wit.
But in such lays as neither ebb nor flow,
Correctly cold, and regularly low, 240
That, shunning faults, one quiet tenor keep,