then did Yehoshua again to them speak, so to say; I am the light of the world; the one, who obeys/follows me after, will at any case not live in the darkness, but will have the light of life.
because thus did us the L-rd command: I have you set for a light to the nations, that you (SG) shall be a salvation unto to the end of the earth. (Yeshayah 49, 6)
because all, which becomes revealed, is light. therefore says He: wake up, you (SG) sleeper, and stand up from the dead, and the Moshiach will you give light! (Yeshayah 60, 1)
to open up their eyes, that they should themselves return from the darkness to the light, and from the power of the Satan to Hashem, so that they should received forgiveness of sin, and an inheritance among those, who are holy become through (way of Hashem) faith in me.
and the city need not have the sun, nor the moon, it to light up; because the glory of Hashem did shine over her, and the Lamb is her light. (Yeshayah 60, 19.)
the people, who was sat in the darkness, have seen a great light, and to those, who are sat in a land and in shadow of death, for them has a light dawned. (Yeshayah 9, 1-2)
that the Moshiach will suffer, and that He, the first to rise resurrection of the dead ones, will proclaim a light to the (Jewish) people and to the nations (of the world).