誓言是蛊惑人心最好的毒药
[shì yán shì gŭ huò rén xīn zuì hăo de dú yào]
'Oath is the best poison to bewitch others' suggests that vows made to someone (usually during intense romantic moments) are deceptive words or honeyed phrases used to gain someone's trust or deep affection, yet such promises often turn out empty and harmful. So-called 'best poison', indicates oaths can be destructive while seeming sincere at first glance.