There are only a handful of religions rooted in historical events rather than in philosophy. When something is historical, we can examine it by looking at events, documents and other historical records. Out of all of the religions in the world, only one provides a concrete, objective means for testing to see whether or not it is true: Christianity.
The means for “knowing” any other religion is true is always subjective. You are told that your bosom will burn or that you will just “feel” in your heart that it is right. There are endless problems with making your feelings the standard for what you believe. The Bible sums up the problems by saying,
“He who trusts in his own heart is a fool” – Proverbs 28:26
We must not base truth on what we feel. It must be the other way around. We must begin with something objective and concrete. Then, if it is shown that it is true, one would be justified in any strong feelings toward it. Feelings are important, but we must begin with facts.
Only Christianity provides a way to do this. Only Christianity gives a test based upon a historical event. Only Christianity says, “If you can prove this historical event to be wrong, then you have disproved the whole of Christianity.”
What is the test? If Jesus literally and historically rose from the dead, then Christianity is true. If He did not, then it is false.
“…if Christ has not been raised, your faith is worthless..” – 1 Corinthians 15:17
Here is how we can know that Christianity is true:
1. If Jesus rose from the dead, then Christianity is true.
2. We know Jesus rose from the dead because the tomb was empty.
3. Therefore, Christianity is true.
As you share this with others, the premise that you may be questioned about is “We know Jesus rose from the dead because the tomb was empty.” Be encouraged about this. No one has ever disproved this statement. There are several alternate explanations for why the tomb was empty, but it is undeniable that it was indeed empty. None of these alternate explanations  explain all of the facts. The only explanation that accounts for all of the facts is that Jesus actually rose from the dead.
Why is Christianity true? The tomb is empty and remains empty today.
 Research some of these alternate explanations: swoon theory, wrong tomb, legend theory, the disciples stole the body, wrong Jesus theory.