But I am interested in this concept of "if there was proof, I would change."
Does not the possibility that empirical evidence of a deity changing one's mind belie the claim of some atheists' stand who also say such evidence will convince them?
Belief is provisional. If I lived in the 16th century, my belief would be that the earth was the center of the universe and the sun revolved around the earth. If some crazy old man told me that the Sun is at rest near the center of the Universe, and that the Earth, spinning on its axis once daily, revolves annually around the Sun I would challenge him and demand proof.
And if I was given that proof, and the proof turned out to be true, I would change my belief.
Belief should be dynamic not static because all truth claims and beliefs are tentative and open to revision if new evidence is discovered.