My wife recently gave me a Labrador retriever puppy we named Max. One day when Max was spending time with me in my study, I was concentrating at my desk and heard the sound of paper ripping behind me. I turned to find a guilty-looking puppy with a book wide open and a page dangling from his mouth.

Our veterinarian tells us that Max is going through his “chewing years.” As puppies lose their milk teeth and permanent ones grow, they soothe their gums by chewing almost anything. We have to watch Max carefully to ensure he isn’t gnawing on something that could harm him, and we point him to healthy alternatives.

Max’s urge to chew—and my responsibility to watch him—cause me to think about what we “chew on” in our minds and hearts. Do we carefully consider what we are feeding our eternal souls when we read or surf the web or watch TV? The Bible encourages us, “Like newborn babies, crave pure spiritual milk, so that by it you may grow up in your salvation, now that you have tasted that the Lord is good” (1 Peter 2:2–3). We need to fill ourselves daily with God’s Word and truth if we are to thrive as followers of Christ. Only then can we grow to maturity in Him.