Likutei Moharan, Part II 2:1/ליקוטי מוהר"ן·תנינא ב׳:א׳

1Yemey Chanukah (The Days of Chanukah) are days of thanks-giving, as it is written, “And they established these eight days of Chanukah for thanksgiving and praise….” (Amidah Prayer)

2“Days of thanksgiving” is the delight of the World to Come, for the essence of the delight of the World to Come is thanking and praising God’s great name. It is < knowing > and acknowledging God, through which we come nearer and closer to Him. For the more we know and acknowledge God, the nearer we are to Him..

3In time to come everything else will be of no consequence whatsoever, as in “All the sacrifices will be abolished other than the thanksgiving-offering” (Vayikra Rabbah 9:7, 27:12; see there). <Of all the hitKaRVut (closeness),> the only one that will remain then <is the thanksgiving- KoRBan (offering). This is the closeness achieved through> thanksgiving and expressing gratitude. Giving thanks and praise and knowing <and acknowledging> God, as it is written (Isaiah 11:9), “for the earth will be filled with daat (unitive knowledge and awareness) of God, as water covers the seabed”—this is the entire delight of the World to Come.