Likutei Moharan 35:2/ליקוטי מוהר"ן ל״ה:ב׳

12. <And when a person> guards himself from extraneous intellect, that is not all. He <also> has to renew the intellect at all times. This is the aspect of “In His goodness He renews daily, always, the work of Creation” (Morning Liturgy). For the renewal of Creation is the renewal of wisdom, as in, “You created everything with wisdom.”

2This is because the renewal of the intellect is the renewal of the soul. For the intellect is the neshamah, as is written (Job 32:8), “the neshamah from the Almighty gives them understanding.” As our Sages taught (Berakhot 10a): Just as the Holy One nourishes the world, so too, the soul nourishes its body. Thus it is the soul that gives vitality to the body, while it itself is the intellect, as is written (Ecclesiastes 7:12), “Wisdom gives life to those who possess it.”