I Am
Jesus is the door. He is the only way to salvation and His sheep hear his voice and follow. They will not listen to another. This is a promise. It means that a Christian may wander, they may make mistakes, but the voice of Jesus brings us back in line. False teachings, our own desires and whatever else may get thrown at someone will not keep His sheep from following Him.
When we enter through Him, we take on His yoke, His teachings and he assures us that His teachings are easy and HIs burden is light. He isn’t bringing us into rules and regulations, He brings us into life. We find ourselves asking not what can I get away with, but how can I be more like Jesus. He is the door and because He is the door, we enter into eternal life and out of Joy we follow Him, imitate Him and let the essence of who He is become the reality of who we are.