We’ve all experienced it: a skill we once practiced, a habit we once maintained, or a truth we once held closely—slowly slipping away over time. Maybe it was a language you studied, an instrument you played, or a relationship you didn’t nurture. The principle is familiar: use it or lose it. And Jesus tells us that this is true when it comes to spiritual truth. His message in Mark 4:21–25 is simple but sobering—we are responsible for what we hear. If we don’t respond to the truth God has given us, we risk becoming hardened to it.

Jesus uses the image of a lamp to make His point, but it’s not just any lamp—it’s the Lamp. He’s speaking about Himself. Jesus, the Light of the World, didn’t come to remain hidden but to be revealed. For a time, His identity and mission may have seemed veiled, but He promised that everything hidde ...