For the purpose of comprehending this consolation the better, we will now speak in general of crosses and sorrows. Our reason assumes that God, if He cared for us and loved us, would ward off all evil from us, whereas now troubles and miseries crowd in upon us from every side; hence the conclusion is that God has either forgotten us, or else He has become our enemy and cares no longer for us; for surely if it were otherwise He would deliver us from our grief and distress. But such thoughts are wicked, and since they are very apt to arise, we must guard against them by applying the Word in true faith, and by following its precepts and not our own thoughts. If we judge our experiences in daily life aside from the light which the Word of God casts upon them, we shall inevitably become victims of error. What says the Word in this connection? Not even a single hair shall fall from our head against the will of God. If we accept this declaration in earnest faith, we will conclude that neither the devil nor the world, no matter how powerful they are, can harm the Christian in the least, if it is not God’s will that they should do so. Christ makes this plain in the parable of the sparrows; these are really useless birds, which do more injury than good, and yet not one of them shall fall to the ground and perish unless it be the will of the Father in heaven, Matt. 10.  Now, if we have any confidence whatever in the words of Jesus, we must conclude from this that God will certainly concern Himself much rather for men than for many sparrows; He therefore will guard them well and will not permit the devil and the world to harm a single one of His Christians against His will. If troubles do come, we infer that God has first given His consent; for against His knowledge they could not arise. Let us well remember this truth, so that we do not think, when evils surround us, that we are forsaken of God; for He has not forgotten where we are, nor is He ignorant of our condition, though He permits sorrows to invest us.  (Luther’s House Postil, Third Sunday after Easter, Volume 2, p. 537)

To our faith the fact is presented that Christ is the Shepherd, the only one who lays down His life for His sheep. No human being, no saint, no angel could accomplish the great work of redeeming fallen man, whom the devil, through the sin committed in paradise, had hurled into death; Christ alone could be this Redeemer through His death. This was this Shepherd’s proper work, which no one else can imitate, as little as any other of His works done for our salvation can be equaled. No one can therefore appropriate to himself the words which Christ here uses: “I am the good Shepherd: the good Shepherd giveth his life for the sheep.” With these words He would teach us to trust in Him, to regard the sufferings of all the saints as naught when compared with His sufferings in our behalf. Moses, the prophets and the apostles were eminent men, true and watchful shepherds and rulers among the people of God; they taught and preached aright what it behooved men to believe and to do; they also suffered much on that account, the most of them even dying the martyr’s death; yet notwithstanding all this they can in no wise be compared with Christ. He is the Only Begotten of the Father, the Lord of glory, the true and only Shepherd over all, who from the foundation of the world spake through the patriarchs and the prophets, and in the fullness of time became man, revealing His Father’s will. He indeed “laid down His life for the sheep,” for all who believe in Him, who trust in Him in life and in death, assured that in Him there is redemption from the power of the devil who held the whole human race in the bondage of sin and death. He also established an everlasting Church throughout the world, and keeps it through His Word, continually increasing her boundaries, that His name may be hallowed and worshiped and confessed. To this end He gave unto the Church His Holy Spirit, the Comforter, who protects her by power divine against the wrath, fury and murderous assaults of the devil and his servants. And though very many lose their life as martyrs of their faith and confession now, yet will they, in the great day of resurrection, be brought by Him into life eternal with all the elect, where there is inexpressible joy and happiness unalloyed; and this to the utter confusion and everlasting shame of His enemies and theirs. (Luther’s House Postil, Second Sunday after Easter, Volume 2, p. 526-527)