Thanking is a form of “admitting” to a specific goodness in our life. When it’s dark, then you don’t see the goodness since you’re somewhat blinded in a bad situation. In darkness you can’t see and walk and enjoy. It’s like not being alive, because your world is a zero situation to you.
The world is beautiful. בוֹט יִכּ םיִק˄ֱא אְרַיַּו “Hashem saw it was good” is said 8 times. But you need light to light up your darkness. םָאוֹבְבּ םיִֹשָֹשְו םָתאֵצְבּ םיִחֵמְֹש תוֹרוֹאְמ םיִבוֹט . First you see and enjoy, then you admit the truth and say thank you. So we see why the Yom Tov of thanks needs light; i.e., so you can realize the goodness going on.
You breathe and see and walk and enjoy food! People ignore all those wonderful parts of their existence. You need to work on Hoda'ah all Chanukah, and the more you thank, the happier you become. Stop living the lie of all humans ויָרֻﬠְנִּמ עַר םָדָאָה בֵל רֶצֵי יִכּ ( a person has inborn negativity) that you have so many difficulties...
Turn on the light and see! Recognize your own greatness, instead of habitually dismissing all the goodness of your life. If a person has a million dollars and he’s not aware of it, then it’s as if he doesn’t have it! The Chazon Ish said: ֵא ֶﬠ ןי ֶצ ְל ב ִמ ֶשׁ י וֹר ֶאה אוֹ ָה ר ֶא ֶמת there is no sadness for the person who lives with the light of truth. If you see the light of truth, you’ll be happy.
