How do we know anything in this world? How do we know whether a defendant in court is guilty or innocent if we didn’t see the crime with our own eyes? Well we simply compile the evidence, analyze it and make the proper judgment based on the evidence. We use reason, logic and scientific evidence to determine how we know anything in this life. The same is true with God. Many atheists mock the existence of God saying that since we can’t “test” Him with the scientific method, there’s no evidence of His existence. Are they right? The problem with their line of reasoning is that they never reason that way in other matters of life (e.g. court cases). We can, through logic, reason and the available scientific evidence know for certain that God exists. Here’s a very concise, simple explanation of this issue at http://alivewithchrist.com/proofgodexists/ we can also learn the answer to how can I get saved there as well.