Another who participated in the movement testified: “It produced everywhere the most deep searching of heart and humiliation of soul before the God of high heaven. It caused a weaning of affections from the things of this world, a healing of controversies and animosities, a confession of wrongs, a breaking down before God, and penitent, brokenhearted supplications to Him for pardon and acceptance. It caused self-abasement and prostration of soul, such as we never before witnessed. As God by Joel commanded, when the great day of God should be at hand, it produced a rending of hearts and not of garments, and a turning unto the Lord with fasting, and weeping, and mourning. As God said by Zechariah, a spirit of grace and supplication was poured out upon His children; they looked to Him whom they had pierced, there was a great mourning in the land, ... and those who were looking for the Lord afflicted their souls before Him.”—Bliss, in Advent Shield and Review, vol. I, p. 271 (January, 1845…
"And rend your heart, and not your garments, and turn unto the Lord your God: for he is gracious and merciful, slow to anger, and of great kindness, and repenteth him of the evil."
The EGW passage, through the quote from Bliss, explicitly references Joel 2:13 regarding rending hearts and turning to the Lord, highlighting the deep repentance and humility experienced during the movement. The direct quote and its application make the connection undeniable.