The Chanukah lamp represents the Torah. Although the sun, the moon, and the stars illuminate and unveil the presence of God, the Torah is above even them. The perfect Torah testifies to God's greatness more than any other aspect of creation.
As a continuation of the class on "The Different Levels On Which G-d Runs the World", this class is on the different levels of sickness, whether ours or those around us. Just as fast-days are a self-induced weakness, which brings us to analyze our lives, priorities & actions, when God sends a sickness, it's not necessarily a punishment but rather a "wake-up call" to induce soul-searching. Life is comprised of such small incidents, some pleasant & others not, some direct & others less so, to keep us awake that we shouldn't live like robots, but rather utilize our Godly free-will to its utmost extent, keeping our lives meaningful & idealistic. Accordingly, even the "bad" messages are seen by Rav Kook as: The process of gradual good.