If you're a Christian, what kinds of evidence do you use when sharing the gospel with non-Christians? We all have our subjective experience of how we came to faith, but those may not convince others that Christianity is objectively true. Here are 3 objective lines of evidence that every believer should be able to share with others. These are the biggest reasons we SHOULD be Christians and why they should too.
1. The God of the Bible is consistent with the cause of the universe
Science has shown us that the universe is not eternal and must have had an absolute beginning. Because time, matter, and space are all parts of this universe, the cause of the universe must be timeless, spaceless, and immaterial. It must also be extremely powerful and highly intelligent in order to have designed this universe. This begins to sound very much like the God of the Bible. There is much more that could be said here and many lines of evidence to back up these statements, but this is the very quick intro.
2. The evidence for the actual, historical resurrection of Jesus proves Christianity is true
This is the number one evidence for Christianity. If you give your children nothing else, this is vital. Even the Apostle Paul said that if Christ is not raised, our faith is in vain. They must know and understand the evidence for the resurrection. It is on this one historical event that Christianity rests.
We have 4 separate eyewitness accounts in the 4 gospels that verify the resurrection event. We also have independent attestation from non-Christian sources as to the major claims of Christianity very early on and we have the writings of the early church fathers to show that Christian claims have not changed over time.
There are several historical facts that even non-Christian historians agree are true based on these lines of evidence:
- Jesus really did die on the cross
- The tomb was empty
- The disciples really believed Jesus rose from the dead and appeared to them
- Christianity exploded out of early 1st century Israel based on the testimony of the apostles
The best explanation for these 4 historical facts is that Jesus did actually rise from the dead. People may die for a story they believe to be true, but people don't die for a story they made up and know to be false. The apostles were in the position to know whether the resurrection actually happened and they went to their deaths without recanting. Again, there is much more to be said here, but this is the core of the issue.
3. The morality given in the Bible is consistent with natural law
This is a very neglected line of evidence, but very useful in helping young people see that Christian morality is not unreasonable and helping them stand against the ridicule of the culture. This one is more difficult to explain in a nutshell, but we see over and over again that immorality violates our design, not just a set of arbitrary laws.
For example, God commands us to abstain from sex before or outside marriage. That's not an arbitrary command. Premarital sex produces heartache, disease, poverty, abortion, and children who are raised in broken homes without a mother or father and thus are more likely to commit crimes, be promiscuous, drop out of school, and have emotional problems. Adultery produces many of the same effects, breaking up homes and harming men, women, and children in the process. These kinds of results show that extramarital sex isn't just immoral because of God's law, but because it deeply harms us by violating the way we were designed to live. We weren't meant to treat our bodies as playthings to be used as we please. Sex means more than just rubbing body parts together for fun.
Our design as humans involves not only our physical design, but our emotional and spiritual design as well and immoral sex violates that design. We can see from nature that extramarital sex is harmful and that shows us that God knew what He was doing when He gave us His laws.
There are many more lines of evidence and much more detail that could be covered for each of these, but these are the big main points every Christian should be able to explain.