How did you know it's a "yes" from God?

[Scenario: We were driving in a car and having casual chats about life in Australia.]

[Premise: Talking about decision-making]

How did you know it's a “Yes” from God?
“I won’t give you the direct answer. It’s like when you know someone very well, you know what they are going to do or plans without them even saying it. 
The spirit knows it. 
The spirit is actually stronger than the flesh.
You will know whether it’s from God or not if you know Him well enough.
This is my indirect answer to that.”

My eyes are wide open. 
How strong could the faith be to have such spiritual answer when one’s driving!