Surety

Proverbs 17:18 A man void of understanding strikes hands, and becomes surety in the presence of his friend. 

‘A man void of understanding strikes hands, and becomes surety in the presence of his friend.’ This means: A man who lacks wisdom and discernment is quick to shake hands on a deal, that is, to seal an agreement or contract, without carefully considering the consequences. By becoming surety, he pledges himself as a guarantor for another person’s debt or obligation, often doing so impulsively and in the presence of a friend.

Such a person exposes his lack of understanding by committing himself financially or legally on behalf of someone else without proper thought. Even if the friend is trustworthy, the act of hastily entering into such a risky obligation without due diligence is foolish.

In essence, this verse warns against rash promises and unwise financial entanglements. It teaches that true understanding involves prudence, restraint, and a careful weighing of consequences, especially when it comes to matters of trust and liability.