દુધ દહીંસે જમત હે, કાંઇસે ફટ જાય.

dudha dahīṁsē jamata hē, kāṁisē phaṭa jāya.

Literally: Milk sets with yogurt, but curdles with something.
What it means: Relationships are built on compatibility but can be instantly ruined by a single bitter element.

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.