How do we know we are among Christ's sheep?

According to John 10, the distinguishing mark of Christ’s sheep is their ability to hear His voice and follow Him. Christ states, 'My sheep hear My voice, and I know them, and they follow Me.' This indicates that true belief in Christ, a result of His effectual call, is a sign of being one of His chosen elect. If someone consciously grasps the gospel as absolute truth and responds to it, this is a strong indication that they belong to Christ's flock. Therefore, genuine faith in the gospel message serves as affirmation of one’s identity as a sheep in His fold.