Likutei Moharan 58:7/ליקוטי מוהר"ן נ״ח:ז׳

17. Through the illumination from Shabbat, the world is roused to repentance motivated by love. This is because ShaBbaT is the aspect of TeShuVah (repentance), the aspect of “Then ShaVTa (you shall return) to God your Lord” (Deuteronomy 30:2). This repentance is motivated by love, the aspect of “O love of delight” (Song of Songs 7:7), for the love stems from the delight of Shabbat, the aspect of “if you call the Shabbat ‘delight’” (Isaiah 58:13) .

2And repentance motivated by love is the aspect of “double bread,” as in the teaching of the Sages, of blessed memory: Here it was motivated by love, there it was motivated by fear (Sotah 31a). {It is brought there: Greater is the one who acts out of love than the one who acts out of fear, since [the merit of] the latter will abide for a thousand generations, while [that of] the former will abide for two thousand generations.} Through repentance motivated by love ‘He shows lovingkindness for two thousand’ (cf. Exodus 20:6) .