"I'm going to heaven bc I have a Jesus tattoo"

Out sharing the gospel the other night, and a guy was asked would he get to heaven if he died tonight. He said yes bc he had a Jesus tattoo. It was really confusing and I thought he was joking except he wasn't laughing. But he walked off and of course I thought of the best response about 10 minutes too late. 

Anyway, though I do not think he was serious, the sad truth is that he didn't know how to get to heaven yet just walked off. Which is the same that I would have done 10 years ago if God didn't change my heart. Praying this guy turns towards the true Jesus of the bible...