'Exists' in the Bible

Look [at] the land of the Chaldeans! {This people no longer exists. Assyria destined} it for wild animals. They erected its siege towers; they demolished its citadel fortresses. It made her like a ruin.

but I observe another law in my members, at war with the law of my mind and making me captive to the law of sin that exists in my members.

For our commonwealth exists in heaven, from which also we eagerly await a savior, the Lord Jesus Christ,

Now without faith [it is] impossible to please [him], for the one who approaches God must believe that he exists and is a rewarder of those who seek him.