Read it through once

A little learning is a dangerous thing Drink deep, or taste not the Pierian spring [216] 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 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 passed And the first clouds and mountains seem the last. But those attained we tremble to survey The growing labors of the lengthened way The increasing prospect tires our wandering eyes, Hills peep o'er hills and Alps on Alps arise!