It's better to believe something might be true or exist, even if there's no definite proof, just in case it is; better safe than sorry.
对于那些无法证实的小道消息，我们还是宁可信其有，早做准备，以免措手不及
Regarding those unconfirmed rumors, it's better to believe them just in case and prepare early to avoid being caught unprepared.
Next Idiom