Chasidut zu Jeschijahu 60:19

2. For this reason these days are called Chanukah, from the word chinuch [preparatory training] and practice for what is to come, for the future redemption. For then, the hidden light will be revealed to us in its fullness, as the Sages taught that “God hid it away for the righteous in the future”, as it says, “the sun will no longer be your light in the day, nor will the glow of the moon be a light for you. But God will be an eternal light for you” (Isaiah 60:19). And this will be at the end of this exile that began with the fourth Kingdom. But even before the end of the third Kingdom, the Kingdom of Greece, the Blessed God shined a small bit of that light for us, even after prophecy had ceased, so that the light can remain with us in this current exile in place of prophecy. For through this light a person can gaze from one end of the universe to the other. And it is therefore called the Chanukah candle, the candle of chinuch [preparatory training] and practice for the eternal light of the future redemption, when that hidden light - about which it was said “let there be light” - will be revealed.