It's not about proving that God exists.

We know that Atheists know about God. God is telling us that He reveals Himself to them through the things that He has created. But they refuse to acknowledge Him. So, our conversations with unbelievers are never about proving that God exists, no matter how hard some people work to turn everything into an ugly debate. Atheists and unbelievers already know, but they don't trust and obey. Our conversations with unbelievers are about invitations. We are inviting people to come to Christ. Anyone who comes to Christ in sincerity, humility, and submission will find Christ. This is available to the most vile of sinners. However, you need to be led by the Holy Spirit in what you say. Let the conversation develop. Let the Holy Anointing flow from your lips.

Most conversations are not debates. They are just every-day conversations. You may say, "You know, the Love of Christ just came over me this morning, and I feel a love for every person." Don't make things up. How is God dealing with you? Talk about it. We live in a society where the majority of people believe in a presupposition of naturalism. In this presupposition, there is no God, so God doesn't speak. Christians may have a double mind on this issue, both believing that God exists and also limiting God's ability to do anything, even to the point of thinking that God doesn't speak to His people. They may be Bible-believing Christians but unaware that the Bible says that God speaks to His people. Some are just embarrassed to speak of their experiences, so they act as though the experiences don't take place. This is one of the ways a follower of Christ denies Christ. In fact, we would live in a different society if those who were redeemed would speak of their experiences with Christ. It's impossible for any unsaved person to argue against your conversation about how God is leading you without that unsaved person being obviously irrational. There is a lot of hostility in society against Christ, but though the ungodly person may speak of science, logic, and reason, they end up being unscientific, illogical, and irrational.

(some caveats about hearing God's Voice)

Don't worry about debaters. There is a growing number of debater-Atheists who go to ridiculous rationalizations, using tricks that would make any politician proud. Atheists have learned that it is irrational to say that they believe God does not exist, since that is what is known as the fallacy of the universal negative. Instead, they will lie and say that they just have a lack of belief in God. Then, they demand that you prove God to them. Of course, whatever you say they can rationalize away. That is the nature of rationalization. If you inform them that no information (of the kind that would have been needed for evolution) is ever added to anything by random processes, they will argue against the scientific Laws of Universal Information to which there are no exceptions. If you use the Second Law of Thermodynamics, they will argue against this law of science to which there are no exceptions. If you use the Law of Biogenesis, they have been taught against this law of science to which there are no exceptions. If you come from the angle of archeology, they will argue against whatever you say. No matter what evidence you bring, they are effectively inoculated against truth. (Read the latest science on the subject: Without Excuse by Werner Gitt, a description of the scientific Laws of Universal Information. See also: Information Theory Part 1, Part 2, Part 3, Part 4. Here is another interesting article.) More is constantly being learned about information and about the Second Law of Thermodynamics. Evolutionists tend to hide in the weeds of the unknown with an argument from ignorance: "If you can't prove, by empirical science, that evolution is impossible, then it happened." By empirical science alone, we can only prove probabilities. The probabilities show the Big-Bang-Billions-of-Years-No-Flood-Molecules-to-Man story to be a bazaar hypothesis, a story that is so improbable that it should not be considered. However, empirical science is not a tool that can prove anything to be true or false absolutely. For absolute proof, we have revelation. (See Basic and Concise Guide to Practical, Useful Logic and Reasoning). God says that He created everything. He is the One Who enforces the laws of nature. He is the One Who will judge all of us in the end. We know that because we know Him presonally through the indwelling Presence of Jesus Christ and the moment-by-moment instruction of the Holy Spirit.

Rather, declare the truth. Tell them how Jesus Christ lives in you, guides you, leads you, works through you, answers your prayers. That is what revelational apologetics is all about. They will rationalize these away too if they are hardened in their belief that there is no God, but you will have declared Christ. Declaring Christ is the way that God has chosen for the unsaved to come to Him. First Corinthians 1:21 says that when, in the wisdom of God, the world doesn't come to know God by means of human philosophy and reasoning, it pleased God to save those who receive His supernatural belief and trust by what the ungodly call the "foolishness" of the impartation of Jesus Christ through proclamation. And God goes on, in this chapter, to explain that He has made Jesus Christ to be our wisdom. And He further explains what Wisdom is: righteousness, holiness, and redemption.

"Do not give dogs what is sacred; do not throw your pearls to pigs. If you do, they may trample them under their feet, and turn and tear you to pieces." Matthew 7:6 You will quickly know the dogs and pigs. When you tell them of spiritual truth, they trample them under their feet and turn and tear you to pieces. With these, just restate a very simple thing such as, "In what you just said, you are speaking from rationalization. I am speaking from revelation." There are other ways of doing the same thing. They will try to bait you off of this, but it is only so that they can attack you. A person in this state has so yield himself or herself to Satan that they have a shield up against God. They are living within an unreal worldview/paradigm/fake-reality that seems more real to them than real reality, and they have built protections in their mind to keep themselves from acknowledging God.