Rather, they refer to the conviction that the Lord Jesus, with all the disciples and Lazarus' household, would be killed by the Jews.
It was clear to all the disciples that when the Lord said, "Let us go into Judea," He was not speaking of the small, relatively quiet and safe village of Bethany.
He meant that He was going again into that hostile land where His murder was being prepared.
On the one hand, the Lord calms their fear. On the other, He points to the feeling of duty, humanly speaking, which stands above all.
At the same time He also reveals to the disciples the higher divine mysteries.
"I must," said the Lord (Jn 9:4-5), "work the works of Him Who sent Me while it is day. The night comes when no one can work. While I am in the world, I am the light of the world."
The Lord is "the light of the world" (Jn 8:12). The same thought is repeated in verses 9-10 of the present chapter.
The Lord had to remain on earth only for a definite time. In this brief period, or boundary of time, appointed by divine providence, the great events that accomplished the salvation of the human race had to take place.
By pointing to this brief time, the Lord also shows that mankind's future blessedness lies in this work, done while the light shines.
Only this time of the Lord's dwelling on earth poured upon all mankind's future life that bright light of truth, love, and faith which shines for us amid the night of this world.
It is very important to notice the Lord's expression concerning the one who stumbles: "there is no light in him," ἐν αὐτῶ.
The Lord did not say that he stumbles because there is no light in the world. "The light shines in the darkness, and the darkness did not overcome it" (Jn 1:5).
Rather, he stumbles because there is no light in the soul of the unbeliever.
Unbelievers have walked, and still walk, in the night of their soul. They stumbled, and still stumble, over that stone of stumbling and scandal for them.
Yet that stone became the foundation of the Church of God on earth; see Mt 21:42-44; 1 Pet 2:7; Rom 9. In the Old Testament books, compare Ps 117:22 and Isa 28:16.
Therefore, when the Lord speaks of day and night, He means, on the one hand, eternal day and eternal light, and on the other, the darkness of unbelief.
The brief dwelling of God in human form on earth is likened to day. This day is eternal for believers.
Those who walk by the light of this day do not stumble. But to kindle this day forever, the Lord, in the relatively brief time of His life, created new life for man.
This He calls working. He calls man's walking by day his abiding in the light of day, so that he may not stumble.
But man's walking outside faith and the ways of God the Lord calls darkness and stumbling.
The most terrible moment of this darkness was the "authority of the prince of darkness, the prince of this world," temporarily permitted by the Lord; Lk 22:53; Jn 14:30.
At that time the light of the world was not extinguished. Yet it was temporarily hidden from the people by the power of darkness, so that it might shine forth with the triumphant, glorious, unflickering light of Christ's joyful resurrection.