So He left them and went away once more and prayed a third time, saying the same thing. — Matthew 26:44

The mark of a true sheep isn't perfection — it's that they know the Shepherd's voice. Jesus said His sheep hear Him, and they follow Him. They won't follow a stranger because they don't recognize the voice of a hireling. This is the work of the Spirit, who gives you discernment to tell the difference between the voice of Christ and the noise of the world. If you belong to Him, you have ears to hear — so keep listening, and keep following.