The answer is: Gravel

Pro 20:17

Proverbs 20:17 pulls us into a discussion on ethics and the consequences of deceitful gains. The imagery here is striking. Sweet bread, a symbol of immediate gratification tempering the initial pangs of hunger, emphasizes how enticing deceit might feel. But alas! The follow-up with gravel starkly reminds us of the inevitable fallout from our choices. It’s an unappetizing reminder that while ill-gotten gains may appear delicious at first, they lead to bitter consequences.

In ancients times, bread was a staple – often shared and a sign of hospitality. Think of the Last Supper where bread symbolizes unity and trust. This relationship underscores the kind of trust broken when deceit enters the equation. When pondering over the "gravel," envision the painful essence of life – hard lessons learned! Just like with sandpaper, it's the grit that often teaches us the best lessons.

Interestingly, deceit doesn’t just root in the obvious lie; it can grow quietly in many forms, revealing itself through envy or exclusion. The ethics in Proverbs push us beyond superficial judgment, urging consideration for heartfelt integrity and communal goodwill—a puzzle woven throughout standout ideas in wisdom literature.

Amplifying this, look at how deceit has been addressed in multiple religious texts across time, urging themes of integrity and the ultimate barrenness of dishonest paths. Isn’t it fascinating how timeless these values remain?