One of the coolest things hanging on the wall in my home office is a Certificate of Authenticity.

It has on it the logo of US Space Shuttle flight 110, which was launched in April 2002. Aboard the Atlantis on that flight was Mission Specialist Rex Walheim, who took into outer space an article from Our Daily Bread titled “Seeing God’s Glory.” Lt. Col. Walheim sent me the certificate to prove that this devotional page actually left earth’s atmosphere.

Sometimes we need these kinds of things—documents that verify truth. If I were to show that article to someone and say, “This flew on the Space Shuttle,” I could be doubted because I would have no proof. But when Walheim sent me the Certificate of Authenticity, he gave me verification.