I can stand up here and say anything, but that doesn’t make it true. I can say, “I’m a tree. I’m a flowering pear tree.” And if I insisted on saying that you’d say, “No, you’re not a flowering tree. You’re a blooming idiot.” The reason I’m not a tree is that I don’t have the inner nature of a tree. A person can say, “I’m a Christian.” But saying doesn’t make it so unless they have had their hearts changed by Jesus.