Myth vs Fact

In this world there are myths and there are facts. C.S Lewis talks about Christianity almost as a myth. I don't understand any of this. I understand that there are many different beliefs, and no one can truly prove their own belief, but Christianity is different. The Bible is full proof that the faith is real. The key word in my last sentence was faith, and the reason why Christians persist and push for their faith is because it is REAL. No other faith has a creator that died for his own people, and then resurrected himself from the dead. Jesus saves! FACT!