"Prove it." This is an attitude. It was the attitude of those who rejected Jesus by saying, "Show us a sign and we will believe you." Of course, He showed plenty of signs so this was not their problem. Their problem was rebellion against God.
So many now take the same attitude saying things like the following:
Prove that God created the Heavens and the Earth and everything in them.
Prove that we didn't just evolve by random chance.
Prove that the Bible is the Word (Utterance) of God without error.
Prove that God is still performing miracles.
Prove that God has restored much of the order of the original Church.
Prove that the Spirit of God is moving among some Christians who are open to His leading.
And there are many other things that such scoffers say. Of course there is plenty of proof. God provides all kinds of proof. However, for a person who is working so hard to keep God out of his or her knowledge, this proof is disregarded.
Christians are also often guilty of the same pitfall. They will believe part of what God reveals through Scripture, but reject other parts, and so their walk with God is very limited.
Ungodly people are forced to hold on tightly to some basic presuppositions. These presuppositions are just simple-minded assumptions. They are filters and a way to censor out any information that supports the existence of God. They set up a web of rules to filter out God. They will only accept those things that conform to Naturalism, materialism, and uniformitarianism. Naturalism claims that God does nothing. Materialism claims that there is no God or spiritual realm. Uniformitarianism claims that there was not creation and that there was no violent worldwide flood, as the Bible and numerous other historical accounts record. Whatever they observe that does not conform to this complex filter is censored. The way that it is censored can take several forms. The ungodly may boldly proclaim that, though the data appears to support God's version and refute the version of the ungodly, yet it still must be interpreted to mean just the opposite of what it does mean. A backup method that ungodly people use is to prophecy that in the future, science will be able to explain what they see as an anomaly. If that fails, they will hide the data, set it aside, or lie to keep the public from knowing the truth. The data clearly demolishes the story of the ungodly and clearly supports the reality of the Creator God, His Bible, and His abiding Presence in His people. When confronted with the obvious, a closed-minded ungodly person says, "I can't understand it." They are willingly ignorant because they refuse to hold God in their knowledge. The reality is that these people, for whatever reason, don't what to know the Creator. They don't want to truly know Jesus, their Creator.