John 10:6

The parable of the sheepfold: V. 6. This parable spake Jesus unto them; but they understood not what things they were which He spake unto them.

The sheepfold is the Church of God of all times. The sheep are the members of the kingdom of God, the believers of both the Old and New Testaments that put their trust in the Word of their redemption through the work of the Messiah.

But the men that were to be their shepherds, their leaders, have from olden times been divided into two classes. There are such as come to the door openly, that have the call and the duty to take care of the souls entrusted to them, and that carry out their difficult calling in the proper manner, with all faithfulness. For they are assistants of the great Shepherd, Jesus Christ, and it is His voice that calls through them. The sheep thus hear the voice of Jesus in the voice of the true pastors, and this they recognize and know perfectly, this they heed gladly. And if they are truly His sheep, they will pay no attention to the call of such as try to imitate the voice of the true Shepherd, but will fear them and flee from them.

"For as He has said of His office which He carries on through His Word, thus He also says of His sheep, how they behave in His kingdom, namely, when the door is opened to Him, they at once hear His voice and learn to know it well, for it is a truly comforting, cheering voice, by which they, delivered from terror and fear, come to the liberty that they may expect all mercy and comfort of God in Christ. And when they have once accepted this Shepherd, they adhere to Him alone with all confidence and hear the teaching of none other" (Luther, 11, 1130).

The spiritual hearing of the true sheep of Christ, of the believers, soon becomes so keen that they will distinguish at once between true and false teaching, and they will fear and shun the voice of strangers. They will be enabled to judge doctrine correctly, without any arbitrary commands of a self-constituted hierarchy. "The other doctrine is that all Christians have power and right to judge all doctrine and to separate themselves from false teachers and bishops and not to obey them. For here hearest thou that Christ says of His sheep: ...A stranger will they not follow. ...For that they can judge such things, of that they have this rule which is stated in this word of Christ, that all who do not preach Christ are thieves and murderers. With this statement the judgment is established that there is need of no further knowledge but to be known of Christ, and that they owe it to Him to follow this judgment and therefore to flee and to shun all such, no matter who, how great, and how many they are" (Luther, 11, 1134).

These false shepherds are characterized as such that climb into the corral some other way except through the door. False teachers, that have no call from Christ, whose false doctrine has no right to exist, will not come with the pure Gospel and with a call of which they can prove its divine origin, but will make use of schemes and stratagems to deceive the sheep and inveigle them into listening to them. "Now the Gospel is so tender and precious, it cannot endure any addition or extra doctrines. The spiritual doctrines of getting to heaven with fasting, prayer, and other similar works, they in themselves are side-paths which the Gospel will not suffer; but the opponents want them, therefore they are thieves and murderers, for they outrage consciences and slay and murder the sheep. ... Thus such a path is murder and death" (Luther, 11, 1118).

All false teachers are thieves and robbers in the sense of Scriptures, and their presence is a constant menace to the Church of God. "But they are called thieves for this reason, since they steal in secretly, and come with fair speeches, as St. Paul says, Rom. 16, 18, with a great show, and also with true sheep's clothing, pretend to have special faithfulness and love for the souls, but incidentally have that mark, whereby Christ teaches to distinguish them, that they do not go in at the door, but climb up some other way, that is, as He Himself explains, come before Him and without Him, do not point and refer to Christ as the only Shepherd and Savior" (Luther, 11, 1125, 1126).