A word to the wise is not sufficient if it doesn't make any sense.

Wisdom, growled the Agirul. "Painful, isn't it? We assume so much and resist learning to the contrary."

Stupidity is doomed,
therefore, to cringe
at every syllable
of wisdom.

A fool's wild speech confounds the wise.

Nothing will a man rue more than refusal to listen to the wise.

Advice is a dangerous gift, even from the wise to the wise, and all courses may run ill.

How terrible is wisdom when it brings no profit to the wise.

The wise through excess of wisdom is made a fool.

It infuriates me to be wrong when I know I'm right.

I cannot repress my indignation at the use of those foolish obsolete, odious, words Whig and Tory.

Cynicism is a sorry kind of wisdom.

Nihil sapientiae odiosius acumine nimio

(Nothing is more hateful to wisdom than excessive cleverness)

Beware of advice — even this.

Intuitive: The word conveys, I think, a diffuse annoyance at our inability to understand how we come by such knowledge.