Like a thorn that goes up into the hand of a drunkard is a proverb in the mouth of fools.
To recommend wisdom to us, and to quicken us to the diligent use of all the means for the getting of wisdom, Solomon here shows that fools are fit for nothing; they are either sottish men, who will never think and design at all, or vicious men, who will never think and design well. 1.
Commenting on Proverbs 26:6-9
As a thorn goeth up into the hand of a drunkard,.... And he perceives it not; or being in his hand he makes an ill use of it, and hurts himself and others with it; so is a parable in the mouth of fools, a proverbial sentence respecting religious matters; or a passage of holy Scripture which either he understands not, and has no spiritual...
As vexatious and unmanageable as a thorn in a drunkard's hand is a parable to a fool. He will be as apt to misuse is as to use it rightly.