Significado de "very + (non-adjective)"

Hello!
I have a question.
I was listening to a song in High School Musical, Breaking Free, and there was an expression that left me confused for not knowing either what it means or its grammar.

[...]
Can you feel it building
Like a wave the ocean just can't control?
Connected by a feeling
Oh, in our very souls (very souls)
[...]

I don't know what this construction, very + non-adjective, means.

Here is another example:

"You are the very first one to get here."

I thank you all!