Likutei Moharan 74:6/ליקוטי מוהר"ן ע״ד:ו׳

16. This is also the explanation of the verse, “It shall be a healing for your navel,” which is the trait of malkhut .

2When one attains the aspect of wisdom, the soul is rectified and he elevates it to its root. This is because the drop of seed is drawn from the mind, and “the mind is wisdom.”