A grandchild of the gaon Rav Simch Hakohen Rappaport the av beis din of Lublin, became deathly ill. The mother begged her husband to allow her to travel to Lizhensk to ask Rebbe Elimelech for a berachah.
When she arrived, she gave the Rebbe a kvittel containing the sick man's name and the name of his mother. Rebbe Elimelech told her that if she wished her son to recover, she must promise that once he regained his strength, he would come and be the Rebbe's guest for Shabbos. If she would promise this he would guarantee that rav's recovery She promised, and the Rebbe told her to go home and reassured her that the rav would indeed recover his health .. The Rebbe gave her a sign that this would come true...
The events transpired exactly as Rebbe Elimelech had predicted. When he had fully recovered, the rav traveled with his mother to Lizhensk to fulfill her promise, and they spent Shabbos with Rebbe Elimelech.
During the Shabbos, the Rebbe told his guest that he knew that in his youth, the rav had studied philosophical works dealing with heretical questions against belief in GD. This had brought him to lose faith in GD and His holy Torah. This is what has caused his illness, and though he was now well, the root of his sickness had not been purged. The Rebbe told him he must travel to Hanipoli to Rebbe Elimelech's brother Rebbe Zisha where he would have a full recovery.
The rav arrived in Hanipoli on Friday before daybreak and went to find lodging s in an inn. There he met an older man who welcomed him and called him by name. The rav, surprised, asked who the older man was. The man introduced himself as Reb Zisha the brother of Rebbe Elimelech.
"Come now to the mikveh," Reb Zisha urged the rav.
Awed by the Rebbe's amazing intuition, the rav went with him. After they had immersed in the purifying waters, the rav could feel that all the questions, doubts, and lack in his faith that had been harboring in his heart had dissipated.
"Now," said Rebe Zisha, "you are completely cured".
And so he was.
