believe vs trust

[keannu]

I think "believe" is about "someone's words or behaviors", while "trust" , "someone's credibility".
So if the following works, the switched ways wouldn't work, right?
1. Did you believe him? = Did you believe what he said or his behavior?
2. Do you trust him? = Do you have any confidence or credibility in him?

 

[Grumpy]

Colloquially, they can mean the same thing when you add "in" after "believe".

Thus, "Do you believe in him?" means exactly the same as "Do you trust him?"

 

[konungursvia]

Believe is for a single utterance, trust is in general.