G‑d appeared to [Abraham] in the plains of Mamre, as he sat at the entrance of the tent in the heat of the day.”

-Vayeira 18:1

With the Messianic redemption, we too shall merit a manifestation of the Divine Presence, just like Abraham. Thus it is written, “Your Master will no longer conceal Himself, and your eyes shall see your Master” (Isaiah 30:20). The people of Israel will be able to see this with their physical eyes-an empirical perception.

The Divine revelation will be so intense that it will be experienced in the physical world: that Divine light will bring healing, 1 literally curing the bodies of Israel from all their diseases and maladies. The verse “G‑d appeared...” thus alludes also to the revelation that will occur to us with the future redemption.

In this context, the miraculous healing to occur then is also alluded to in the concluding phrase of “in the heat of the day.” Our sages state that in the future (the Messianic age), G‑d will take out the sun from its sheath, and the righteous will be healed by it (Nedarim 8b). It is written: “Your people, all are righteous...” (Isaiah 60:20)