That’s not bad insight into life. We often hear the phrase, “garbage in, garbage out,” but that’s true of good things as well. Jesus taught this clearly:
"The good man out of the good treasure of his heart brings forth what is good; and the evil man out of the evil treasure brings forth what is evil; for his mouth speaks from that which fills his heart.” (Luke 6:45)You don’t have to be a Christian to recognize this. What we pour into our lives is what will eventually pour out of it in some way. It’s one reason people are increasingly talking about the power of entertainment. There are ways to filter it – there’s a lot to be said about learning how to read, listen and watch as a Christian who listens and sees through the eyes and ears of Jesus – but in some fashion, what comes in will come out.
- CNN’s Health section online featured an article entitled “Should Smoking Trigger an R rating?” The author noted, “For every 500 smoking scenes a child saw in PG-13 movies, his or her likelihood of trying cigarettes increased by 49%.” 
- The Official Journal of the American Academy of Pediatrics reported: “Youths [12-17 years old who viewed sexual content on TV] in the 90th percentile of TV sex viewing had a predicted probability of intercourse initiation that was approximately double that of youths in the 10th percentile... Exposure to TV that included only talk about sex was associated with the same risks...”
We all fill our glass with something. The words and actions and attitudes that overflow will reflect the abundance of images and ideas with which we have filled ourselves. In 2 Corinthians, Paul makes a similar claim: We will become what we see. He uses the analogy of a mirror reflecting, but the idea is the same.