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Toxic People quotes

Explore Toxic People quotations through trust and reciprocity, communication and conflict, care expressed through action. Compare how different writers frame the idea across distinct works and periods.

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Shortest in this collection“There’s daggers in men’s smiles.” — William ShakespeareLongest in this collection“O, beware, my lord, of jealousy; It is the green-eyed monster which doth mock the meat…” — William Shakespeare
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Source identified1
There’s daggers in men’s smiles.
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“There’s daggers in men’s smiles.”

William Shakespeare · Macbeth · c. 1606
Voice: Fictional character · Donalbain
Meaning & context

Friendly appearance can conceal harmful intent, so trust should consider patterns of conduct rather than expressions alone.

Source details

Macbeth, Act II, Scene III, reviewed against the scan-backed 1918 Yale text and the First Folio facsimile. Donalbain's 'There's daggers in men's smiles' follows Duncan's murder as Malcolm and Donalbain decide to flee; it is fictional suspicion under immediate danger rather than a universal claim about trust.

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Source identified2
O, beware, my lord, of jealousy; It is the green-eyed monster which doth mock the meat it feeds on.
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“O, beware, my lord, of jealousy; It is the green-eyed monster which doth mock the meat it feeds on.”

William Shakespeare · Othello · c. 1603
Voice: Fictional character · Iago
Meaning & context

Jealousy is described as self-consuming because it feeds on suspicion while tormenting the person who carries it.

Source details

Othello, Act III, Scene III, reviewed against the scan-backed First Folio facsimile. Iago's green-eyed-monster image is manipulative fictional dialogue used while cultivating Othello's jealousy; it is not Shakespeare's direct psychological diagnosis or clinical evidence.

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Topic guide

A quick guide to toxic people

Relationship quotations become more useful when they distinguish affection from trust, closeness from dependence, and loyalty from the absence of boundaries.

Reading lenses

Trust and reciprocityCommunication and conflictCare expressed through actionBoundaries, loyalty, and repair

How to use this page

Compare lines against the actual relationship. A quotation that is right for a close friend may be too intimate for a colleague, while a line about forgiveness does not automatically require reconciliation.

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Authors and sources

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Voices in this collection

William Shakespeare2 quotations in this topic

Named sources

Macbethc. 1606 · 1 quotation
Othelloc. 1603 · 1 quotation