you never know

I'm not sure if I'll go to the party, you never know

He might be hiding something, you never know

Always lock your doors, you never know who might try to get in

This weather is so unpredictable, you never know when it will rain

She seemed confident, but you never know what's going on inside

It's good to be prepared for anything, you never know what might happen

He might show up unexpectedly, you never know

Don't underestimate him, you never know what he's capable of

The stock market can be volatile, you never know when it will crash

Always be polite to strangers, you never know who they might be