Rabeinu says: the sicker the person is, the greater the healer must be.

This Torah delves into the concepts of greater and lower intellects- the idea that in order to grasp perceptions of G-dliness one must constantly search for a Rebbe who is able to enclothe great levels of understanding into smaller levels of intellect in order for us (people who are far from G-d) to understand and perceive G-d according to our level. Rabeinu explains that the further one is from G-d, the greater the tzadik he needs to heal him from his spiritual sickness.

Rabeinu connects this idea to the subjects of: hair, money, the 3 Festivals, elevating the holy Malkhut from the 4 exiles, the 4 sons in the Haggadah, the revelation of Chesed, rebuke, prayer, the voice of every individual, etc…