Nothing From Outside

I'm going to write about something that may offend churched sensibilities. I might even lose my standing as a Christian mom. Consider yourself warned.

Tonight my son confided something that had been puzzling him for some time. He said that about a  year ago he had been trying to tell two friends at church about the movie Napoleon Dynamite, which he is very amused by. One of the boys asked him, "Does he say s-h-i-t?"
Isaiah said, "No. What is shit?"
At this point in his story, I asked him, "Do you know what that means? Have you ever heard that word before?"
"No." He looked confused.
"The reason you haven't heard that word is because it's a word that we don't use. Most people consider it to be a bad word, and it means 'poop'. So what did they say when you asked that?"
"They didn't tell me what it meant, but one of them went to the teacher and told her, 'Isaiah said "shit".'"
"So what did the teacher do? Did you get in trouble?"
"She said, 'Don't say that!' But I said, 'I don't know what it is.'"
"Isaiah, that is a perfect case of man looking on the outward appearance, and God looking on the heart. Obviously your heart has to be dirty for a dirty word to mean anything, huh?"
He nodded and said, "It made me kind of mad that they told me that word, and I didn't even know that word, and then they..."
"They set a trap for you, didn't they?"
"Yes. And tried to get me in trouble. And I was afraid to ask you what it meant, because I thought you would get mad that someone told me that."
"Who do you think had the dirty heart: the one who tried to get you to say the word, or you for saying the word when you didn't know it?"
"They did. They wanted to talk about it."
"Son, in this world, there will be all kinds of people who try to introduce you to dirty things you don't know anything about. It's gross, and it's wrong, but it's a fact here. You have to learn to tell the difference between those things, and to know what things you should have nothing to do with. And you didn't sin because someone told you that word."

"And calling near all the crowd, He said to them, 
'Listen to Me, every one of you, and understand.
There is nothing from outside a man which entering into him can defile him. 
But the things which come out of him, those are the ones that defile the man.'"
Mark 7:14,15