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.

Some people will never learn anything, for this reason, because they understand everything too soon.

A little learning is a dangerous thing.

Know then thyself; presume not God to scan; The proper study of mankind is man.

True Wit is Nature to advantage dress'd
What oft was thought, but ne'er so well express'd;
Something whose truth convinced at sight we find,
That gives us back the image of our mind.
As shades more sweetly recommend the light,
So modest plainness sets off sprightly wit.

See my lips tremble, and my eye-balls roll,/ Suck my last breath, and catch my flying soul!